OK, let's work through this together. We're starting with 789 and we're going to multiply it by 500, which means we add 789 to itself 500 times.
Step 1: 0 + 789 = 789
Step 2: 789 + 789 = 1578
Step 3: 1578 + 789 = 2367
Step 4: 2367 + 789 = 3156
Step 5: 3156 + 789 = 3945
Step 6: 3945 + 789 = 4734
Step 7: 4734 + 789 = 5523
Step 8: 5523 + 789 = 6312
Step 9: 6312 + 789 = 7101
Step 10: 7101 + 789 = 7890
Step 11: 7890 + 789 = 8679
Step 12: 8679 + 789 = 9468
Step 13: 9468 + 789 = 10257
Step 14: 10257 + 789 = 11046
Step 15: 11046 + 789 = 11835
Step 16: 11835 + 789 = 12624
Step 17: 12624 + 789 = 13413
Step 18: 13413 + 789 = 14202
Step 19: 14202 + 789 = 14991
Step 20: 14991 + 789 = 15780
Step 21: 15780 + 789 = 16569
Step 22: 16569 + 789 = 17358
Step 23: 17358 + 789 = 18147
Step 24: 18147 + 789 = 18936
Step 25: 18936 + 789 = 19725
Step 26: 19725 + 789 = 20514
Step 27: 20514 + 789 = 21303
Step 28: 21303 + 789 = 22092
Step 29: 22092 + 789 = 22881
Step 30: 22881 + 789 = 23670
Step 31: 23670 + 789 = 24459
Step 32: 24459 + 789 = 25248
Step 33: 25248 + 789 = 26037
Step 34: 26037 + 789 = 26826
Step 35: 26826 + 789 = 27615
Step 36: 27615 + 789 = 28404
Step 37: 28404 + 789 = 29193
Step 38: 29193 + 789 = 29982
Step 39: 29982 + 789 = 30771
Step 40: 30771 + 789 = 31560
Step 41: 31560 + 789 = 32349
Step 42: 32349 + 789 = 33138
Step 43: 33138 + 789 = 33927
Step 44: 33927 + 789 = 34716
Step 45: 34716 + 789 = 35505
Step 46: 35505 + 789 = 36294
Step 47: 36294 + 789 = 37083
Step 48: 37083 + 789 = 37872
Step 49: 37872 + 789 = 38661
Step 50: 38661 + 789 = 39450
Step 51: 39450 + 789 = 40239
Step 52: 40239 + 789 = 41028
Step 53: 41028 + 789 = 41817
Step 54: 41817 + 789 = 42606
Step 55: 42606 + 789 = 43395
Step 56: 43395 + 789 = 44184
Step 57: 44184 + 789 = 44973
Step 58: 44973 + 789 = 45762
Step 59: 45762 + 789 = 46551
Step 60: 46551 + 789 = 47340
Step 61: 47340 + 789 = 48129
Step 62: 48129 + 789 = 48918
Step 63: 48918 + 789 = 49707
Step 64: 49707 + 789 = 50496
Step 65: 50496 + 789 = 51285
Step 66: 51285 + 789 = 52074
Step 67: 52074 + 789 = 52863
Step 68: 52863 + 789 = 53652
Step 69: 53652 + 789 = 54441
Step 70: 54441 + 789 = 55230
Step 71: 55230 + 789 = 56019
Step 72: 56019 + 789 = 56808
Step 73: 56808 + 789 = 57597
Step 74: 57597 + 789 = 58386
Step 75: 58386 + 789 = 59175
Step 76: 59175 + 789 = 59964
Step 77: 59964 + 789 = 60753
Step 78: 60753 + 789 = 61542
Step 79: 61542 + 789 = 62331
Step 80: 62331 + 789 = 63120
Step 81: 63120 + 789 = 63909
Step 82: 63909 + 789 = 64698
Step 83: 64698 + 789 = 65487
Step 84: 65487 + 789 = 66276
Step 85: 66276 + 789 = 67065
Step 86: 67065 + 789 = 67854
Step 87: 67854 + 789 = 68643
Step 88: 68643 + 789 = 69432
Step 89: 69432 + 789 = 70221
Step 90: 70221 + 789 = 71010
Step 91: 71010 + 789 = 71799
Step 92: 71799 + 789 = 72588
Step 93: 72588 + 789 = 73377
Step 94: 73377 + 789 = 74166
Step 95: 74166 + 789 = 74955
Step 96: 74955 + 789 = 75744
Step 97: 75744 + 789 = 76533
Step 98: 76533 + 789 = 77322
Step 99: 77322 + 789 = 78111
Step 100: 78111 + 789 = 78900
Step 101: 78900 + 789 = 79689
Step 102: 79689 + 789 = 80478
Step 103: 80478 + 789 = 81267
Step 104: 81267 + 789 = 82056
Step 105: 82056 + 789 = 82845
Step 106: 82845 + 789 = 83634
Step 107: 83634 + 789 = 84423
Step 108: 84423 + 789 = 85212
Step 109: 85212 + 789 = 86001
Step 110: 86001 + 789 = 86790
Step 111: 86790 + 789 = 87579
Step 112: 87579 + 789 = 88368
Step 113: 88368 + 789 = 89157
Step 114: 89157 + 789 = 89946
Step 115: 89946 + 789 = 90735
Step 116: 90735 + 789 = 91524
Step 117: 91524 + 789 = 92313
Step 118: 92313 + 789 = 93102
Step 119: 93102 + 789 = 93891
Step 120: 93891 + 789 = 94680
Step 121: 94680 + 789 = 95469
Step 122: 95469 + 789 = 96258
Step 123: 96258 + 789 = 97047
Step 124: 97047 + 789 = 97836
Step 125: 97836 + 789 = 98625
Step 126: 98625 + 789 = 99414
Step 127: 99414 + 789 = 100203
Step 128: 100203 + 789 = 100992
Step 129: 100992 + 789 = 101781
Step 130: 101781 + 789 = 102570
Step 131: 102570 + 789 = 103359
Step 132: 103359 + 789 = 104148
Step 133: 104148 + 789 = 104937
Step 134: 104937 + 789 = 105726
Step 135: 105726 + 789 = 106515
Step 136: 106515 + 789 = 107304
Step 137: 107304 + 789 = 108093
Step 138: 108093 + 789 = 108882
Step 139: 108882 + 789 = 109671
Step 140: 109671 + 789 = 110460
Step 141: 110460 + 789 = 111249
Step 142: 111249 + 789 = 112038
Step 143: 112038 + 789 = 112827
Step 144: 112827 + 789 = 113616
Step 145: 113616 + 789 = 114405
Step 146: 114405 + 789 = 115194
Step 147: 115194 + 789 = 115983
Step 148: 115983 + 789 = 116772
Step 149: 116772 + 789 = 117561
Step 150: 117561 + 789 = 118350
Step 151: 118350 + 789 = 119139
Step 152: 119139 + 789 = 119928
Step 153: 119928 + 789 = 120717
Step 154: 120717 + 789 = 121506
Step 155: 121506 + 789 = 122295
Step 156: 122295 + 789 = 123084
Step 157: 123084 + 789 = 123873
Step 158: 123873 + 789 = 124662
Step 159: 124662 + 789 = 125451
Step 160: 125451 + 789 = 126240
Step 161: 126240 + 789 = 127029
Step 162: 127029 + 789 = 127818
Step 163: 127818 + 789 = 128607
Step 164: 128607 + 789 = 129396
Step 165: 129396 + 789 = 130185
Step 166: 130185 + 789 = 130974
Step 167: 130974 + 789 = 131763
Step 168: 131763 + 789 = 132552
Step 169: 132552 + 789 = 133341
Step 170: 133341 + 789 = 134130
Step 171: 134130 + 789 = 134919
Step 172: 134919 + 789 = 135708
Step 173: 135708 + 789 = 136497
Step 174: 136497 + 789 = 137286
Step 175: 137286 + 789 = 138075
Step 176: 138075 + 789 = 138864
Step 177: 138864 + 789 = 139653
Step 178: 139653 + 789 = 140442
Step 179: 140442 + 789 = 141231
Step 180: 141231 + 789 = 142020
Step 181: 142020 + 789 = 142809
Step 182: 142809 + 789 = 143598
Step 183: 143598 + 789 = 144387
Step 184: 144387 + 789 = 145176
Step 185: 145176 + 789 = 145965
Step 186: 145965 + 789 = 146754
Step 187: 146754 + 789 = 147543
Step 188: 147543 + 789 = 148332
Step 189: 148332 + 789 = 149121
Step 190: 149121 + 789 = 149910
Step 191: 149910 + 789 = 150699
Step 192: 150699 + 789 = 151488
Step 193: 151488 + 789 = 152277
Step 194: 152277 + 789 = 153066
Step 195: 153066 + 789 = 153855
Step 196: 153855 + 789 = 154644
Step 197: 154644 + 789 = 155433
Step 198: 155433 + 789 = 156222
Step 199: 156222 + 789 = 157011
Step 200: 157011 + 789 = 157800
Step 201: 157800 + 789 = 158589
Step 202: 158589 + 789 = 159378
Step 203: 159378 + 789 = 160167
Step 204: 160167 + 789 = 160956
Step 205: 160956 + 789 = 161745
Step 206: 161745 + 789 = 162534
Step 207: 162534 + 789 = 163323
Step 208: 163323 + 789 = 164112
Step 209: 164112 + 789 = 164901
Step 210: 164901 + 789 = 165690
Step 211: 165690 + 789 = 166479
Step 212: 166479 + 789 = 167268
Step 213: 167268 + 789 = 168057
Step 214: 168057 + 789 = 168846
Step 215: 168846 + 789 = 169635
Step 216: 169635 + 789 = 170424
Step 217: 170424 + 789 = 171213
Step 218: 171213 + 789 = 172002
Step 219: 172002 + 789 = 172791
Step 220: 172791 + 789 = 173580
Step 221: 173580 + 789 = 174369
Step 222: 174369 + 789 = 175158
Step 223: 175158 + 789 = 175947
Step 224: 175947 + 789 = 176736
Step 225: 176736 + 789 = 177525
Step 226: 177525 + 789 = 178314
Step 227: 178314 + 789 = 179103
Step 228: 179103 + 789 = 179892
Step 229: 179892 + 789 = 180681
Step 230: 180681 + 789 = 181470
Step 231: 181470 + 789 = 182259
Step 232: 182259 + 789 = 183048
Step 233: 183048 + 789 = 183837
Step 234: 183837 + 789 = 184626
Step 235: 184626 + 789 = 185415
Step 236: 185415 + 789 = 186204
Step 237: 186204 + 789 = 186993
Step 238: 186993 + 789 = 187782
Step 239: 187782 + 789 = 188571
Step 240: 188571 + 789 = 189360
Step 241: 189360 + 789 = 190149
Step 242: 190149 + 789 = 190938
Step 243: 190938 + 789 = 191727
Step 244: 191727 + 789 = 192516
Step 245: 192516 + 789 = 193305
Step 246: 193305 + 789 = 194094
Step 247: 194094 + 789 = 194883
Step 248: 194883 + 789 = 195672
Step 249: 195672 + 789 = 196461
Step 250: 196461 + 789 = 197250
Step 251: 197250 + 789 = 198039
Step 252: 198039 + 789 = 198828
Step 253: 198828 + 789 = 199617
Step 254: 199617 + 789 = 200406
Step 255: 200406 + 789 = 201195
Step 256: 201195 + 789 = 201984
Step 257: 201984 + 789 = 202773
Step 258: 202773 + 789 = 203562
Step 259: 203562 + 789 = 204351
Step 260: 204351 + 789 = 205140
Step 261: 205140 + 789 = 205929
Step 262: 205929 + 789 = 206718
Step 263: 206718 + 789 = 207507
Step 264: 207507 + 789 = 208296
Step 265: 208296 + 789 = 209085
Step 266: 209085 + 789 = 209874
Step 267: 209874 + 789 = 210663
Step 268: 210663 + 789 = 211452
Step 269: 211452 + 789 = 212241
Step 270: 212241 + 789 = 213030
Step 271: 213030 + 789 = 213819
Step 272: 213819 + 789 = 214608
Step 273: 214608 + 789 = 215397
Step 274: 215397 + 789 = 216186
Step 275: 216186 + 789 = 216975
Step 276: 216975 + 789 = 217764
Step 277: 217764 + 789 = 218553
Step 278: 218553 + 789 = 219342
Step 279: 219342 + 789 = 220131
Step 280: 220131 + 789 = 220920
Step 281: 220920 + 789 = 221709
Step 282: 221709 + 789 = 222498
Step 283: 222498 + 789 = 223287
Step 284: 223287 + 789 = 224076
Step 285: 224076 + 789 = 224865
Step 286: 224865 + 789 = 225654
Step 287: 225654 + 789 = 226443
Step 288: 226443 + 789 = 227232
Step 289: 227232 + 789 = 228021
Step 290: 228021 + 789 = 228810
Step 291: 228810 + 789 = 229599
Step 292: 229599 + 789 = 230388
Step 293: 230388 + 789 = 231177
Step 294: 231177 + 789 = 231966
Step 295: 231966 + 789 = 232755
Step 296: 232755 + 789 = 233544
Step 297: 233544 + 789 = 234333
Step 298: 234333 + 789 = 235122
Step 299: 235122 + 789 = 235911
Step 300: 235911 + 789 = 236700
Step 301: 236700 + 789 = 237489
Step 302: 237489 + 789 = 238278
Step 303: 238278 + 789 = 239067
Step 304: 239067 + 789 = 239856
Step 305: 239856 + 789 = 240645
Step 306: 240645 + 789 = 241434
Step 307: 241434 + 789 = 242223
Step 308: 242223 + 789 = 243012
Step 309: 243012 + 789 = 243801
Step 310: 243801 + 789 = 244590
Step 311: 244590 + 789 = 245379
Step 312: 245379 + 789 = 246168
Step 313: 246168 + 789 = 246957
Step 314: 246957 + 789 = 247746
Step 315: 247746 + 789 = 248535
Step 316: 248535 + 789 = 249324
Step 317: 249324 + 789 = 250113
Step 318: 250113 + 789 = 250902
Step 319: 250902 + 789 = 251691
Step 320: 251691 + 789 = 252480
Step 321: 252480 + 789 = 253269
Step 322: 253269 + 789 = 254058
Step 323: 254058 + 789 = 254847
Step 324: 254847 + 789 = 255636
Step 325: 255636 + 789 = 256425
Step 326: 256425 + 789 = 257214
Step 327: 257214 + 789 = 258003
Step 328: 258003 + 789 = 258792
Step 329: 258792 + 789 = 259581
Step 330: 259581 + 789 = 260370
Step 331: 260370 + 789 = 261159
Step 332: 261159 + 789 = 261948
Step 333: 261948 + 789 = 262737
Step 334: 262737 + 789 = 263526
Step 335: 263526 + 789 = 264315
Step 336: 264315 + 789 = 265104
Step 337: 265104 + 789 = 265893
Step 338: 265893 + 789 = 266682
Step 339: 266682 + 789 = 267471
Step 340: 267471 + 789 = 268260
Step 341: 268260 + 789 = 269049
Step 342: 269049 + 789 = 269838
Step 343: 269838 + 789 = 270627
Step 344: 270627 + 789 = 271416
Step 345: 271416 + 789 = 272205
Step 346: 272205 + 789 = 272994
Step 347: 272994 + 789 = 273783
Step 348: 273783 + 789 = 274572
Step 349: 274572 + 789 = 275361
Step 350: 275361 + 789 = 276150
Step 351: 276150 + 789 = 276939
Step 352: 276939 + 789 = 277728
Step 353: 277728 + 789 = 278517
Step 354: 278517 + 789 = 279306
Step 355: 279306 + 789 = 280095
Step 356: 280095 + 789 = 280884
Step 357: 280884 + 789 = 281673
Step 358: 281673 + 789 = 282462
Step 359: 282462 + 789 = 283251
Step 360: 283251 + 789 = 284040
Step 361: 284040 + 789 = 284829
Step 362: 284829 + 789 = 285618
Step 363: 285618 + 789 = 286407
Step 364: 286407 + 789 = 287196
Step 365: 287196 + 789 = 287985
Step 366: 287985 + 789 = 288774
Step 367: 288774 + 789 = 289563
Step 368: 289563 + 789 = 290352
Step 369: 290352 + 789 = 291141
Step 370: 291141 + 789 = 291930
Step 371: 291930 + 789 = 292719
Step 372: 292719 + 789 = 293508
Step 373: 293508 + 789 = 294297
Step 374: 294297 + 789 = 295086
Step 375: 295086 + 789 = 295875
Step 376: 295875 + 789 = 296664
Step 377: 296664 + 789 = 297453
Step 378: 297453 + 789 = 298242
Step 379: 298242 + 789 = 299031
Step 380: 299031 + 789 = 299820
Step 381: 299820 + 789 = 300609
Step 382: 300609 + 789 = 301398
Step 383: 301398 + 789 = 302187
Step 384: 302187 + 789 = 302976
Step 385: 302976 + 789 = 303765
Step 386: 303765 + 789 = 304554
Step 387: 304554 + 789 = 305343
Step 388: 305343 + 789 = 306132
Step 389: 306132 + 789 = 306921
Step 390: 306921 + 789 = 307710
Step 391: 307710 + 789 = 308499
Step 392: 308499 + 789 = 309288
Step 393: 309288 + 789 = 310077
Step 394: 310077 + 789 = 310866
Step 395: 310866 + 789 = 311655
Step 396: 311655 + 789 = 312444
Step 397: 312444 + 789 = 313233
Step 398: 313233 + 789 = 314022
Step 399: 314022 + 789 = 314811
Step 400: 314811 + 789 = 315600
Step 401: 315600 + 789 = 316389
Step 402: 316389 + 789 = 317178
Step 403: 317178 + 789 = 317967
Step 404: 317967 + 789 = 318756
Step 405: 318756 + 789 = 319545
Step 406: 319545 + 789 = 320334
Step 407: 320334 + 789 = 321123
Step 408: 321123 + 789 = 321912
Step 409: 321912 + 789 = 322701
Step 410: 322701 + 789 = 323490
Step 411: 323490 + 789 = 324279
Step 412: 324279 + 789 = 325068
Step 413: 325068 + 789 = 325857
Step 414: 325857 + 789 = 326646
Step 415: 326646 + 789 = 327435
Step 416: 327435 + 789 = 328224
Step 417: 328224 + 789 = 329013
Step 418: 329013 + 789 = 329802
Step 419: 329802 + 789 = 330591
Step 420: 330591 + 789 = 331380
Step 421: 331380 + 789 = 332169
Step 422: 332169 + 789 = 332958
Step 423: 332958 + 789 = 333747
Step 424: 333747 + 789 = 334536
Step 425: 334536 + 789 = 335325
Step 426: 335325 + 789 = 336114
Step 427: 336114 + 789 = 336903
Step 428: 336903 + 789 = 337692
Step 429: 337692 + 789 = 338481
Step 430: 338481 + 789 = 339270
Step 431: 339270 + 789 = 340059
Step 432: 340059 + 789 = 340848
Step 433: 340848 + 789 = 341637
Step 434: 341637 + 789 = 342426
Step 435: 342426 + 789 = 343215
Step 436: 343215 + 789 = 344004
Step 437: 344004 + 789 = 344793
Step 438: 344793 + 789 = 345582
Step 439: 345582 + 789 = 346371
Step 440: 346371 + 789 = 347160
Step 441: 347160 + 789 = 347949
Step 442: 347949 + 789 = 348738
Step 443: 348738 + 789 = 349527
Step 444: 349527 + 789 = 350316
Step 445: 350316 + 789 = 351105
Step 446: 351105 + 789 = 351894
Step 447: 351894 + 789 = 352683
Step 448: 352683 + 789 = 353472
Step 449: 353472 + 789 = 354261
Step 450: 354261 + 789 = 355050
Step 451: 355050 + 789 = 355839
Step 452: 355839 + 789 = 356628
Step 453: 356628 + 789 = 357417
Step 454: 357417 + 789 = 358206
Step 455: 358206 + 789 = 358995
Step 456: 358995 + 789 = 359784
Step 457: 359784 + 789 = 360573
Step 458: 360573 + 789 = 361362
Step 459: 361362 + 789 = 362151
Step 460: 362151 + 789 = 362940
Step 461: 362940 + 789 = 363729
Step 462: 363729 + 789 = 364518
Step 463: 364518 + 789 = 365307
Step 464: 365307 + 789 = 366096
Step 465: 366096 + 789 = 366885
Step 466: 366885 + 789 = 367674
Step 467: 367674 + 789 = 368463
Step 468: 368463 + 789 = 369252
Step 469: 369252 + 789 = 370041
Step 470: 370041 + 789 = 370830
Step 471: 370830 + 789 = 371619
Step 472: 371619 + 789 = 372408
Step 473: 372408 + 789 = 373197
Step 474: 373197 + 789 = 373986
Step 475: 373986 + 789 = 374775
Step 476: 374775 + 789 = 375564
Step 477: 375564 + 789 = 376353
Step 478: 376353 + 789 = 377142
Step 479: 377142 + 789 = 377931
Step 480: 377931 + 789 = 378720
Step 481: 378720 + 789 = 379509
Step 482: 379509 + 789 = 380298
Step 483: 380298 + 789 = 381087
Step 484: 381087 + 789 = 381876
Step 485: 381876 + 789 = 382665
Step 486: 382665 + 789 = 383454
Step 487: 383454 + 789 = 384243
Step 488: 384243 + 789 = 385032
Step 489: 385032 + 789 = 385821
Step 490: 385821 + 789 = 386610
Step 491: 386610 + 789 = 387399
Step 492: 387399 + 789 = 388188
Step 493: 388188 + 789 = 388977
Step 494: 388977 + 789 = 389766
Step 495: 389766 + 789 = 390555
Step 496: 390555 + 789 = 391344
Step 497: 391344 + 789 = 392133
Step 498: 392133 + 789 = 392922
Step 499: 392922 + 789 = 393711
Step 500: 393711 + 789 = 394500

So, 789*500 = 394500