Let's roll up our sleeves and solve this. We have 853 and we're going to multiply it by 490, essentially adding 853 to itself 490 times.
Step 1: 0 + 853 = 853
Step 2: 853 + 853 = 1706
Step 3: 1706 + 853 = 2559
Step 4: 2559 + 853 = 3412
Step 5: 3412 + 853 = 4265
Step 6: 4265 + 853 = 5118
Step 7: 5118 + 853 = 5971
Step 8: 5971 + 853 = 6824
Step 9: 6824 + 853 = 7677
Step 10: 7677 + 853 = 8530
Step 11: 8530 + 853 = 9383
Step 12: 9383 + 853 = 10236
Step 13: 10236 + 853 = 11089
Step 14: 11089 + 853 = 11942
Step 15: 11942 + 853 = 12795
Step 16: 12795 + 853 = 13648
Step 17: 13648 + 853 = 14501
Step 18: 14501 + 853 = 15354
Step 19: 15354 + 853 = 16207
Step 20: 16207 + 853 = 17060
Step 21: 17060 + 853 = 17913
Step 22: 17913 + 853 = 18766
Step 23: 18766 + 853 = 19619
Step 24: 19619 + 853 = 20472
Step 25: 20472 + 853 = 21325
Step 26: 21325 + 853 = 22178
Step 27: 22178 + 853 = 23031
Step 28: 23031 + 853 = 23884
Step 29: 23884 + 853 = 24737
Step 30: 24737 + 853 = 25590
Step 31: 25590 + 853 = 26443
Step 32: 26443 + 853 = 27296
Step 33: 27296 + 853 = 28149
Step 34: 28149 + 853 = 29002
Step 35: 29002 + 853 = 29855
Step 36: 29855 + 853 = 30708
Step 37: 30708 + 853 = 31561
Step 38: 31561 + 853 = 32414
Step 39: 32414 + 853 = 33267
Step 40: 33267 + 853 = 34120
Step 41: 34120 + 853 = 34973
Step 42: 34973 + 853 = 35826
Step 43: 35826 + 853 = 36679
Step 44: 36679 + 853 = 37532
Step 45: 37532 + 853 = 38385
Step 46: 38385 + 853 = 39238
Step 47: 39238 + 853 = 40091
Step 48: 40091 + 853 = 40944
Step 49: 40944 + 853 = 41797
Step 50: 41797 + 853 = 42650
Step 51: 42650 + 853 = 43503
Step 52: 43503 + 853 = 44356
Step 53: 44356 + 853 = 45209
Step 54: 45209 + 853 = 46062
Step 55: 46062 + 853 = 46915
Step 56: 46915 + 853 = 47768
Step 57: 47768 + 853 = 48621
Step 58: 48621 + 853 = 49474
Step 59: 49474 + 853 = 50327
Step 60: 50327 + 853 = 51180
Step 61: 51180 + 853 = 52033
Step 62: 52033 + 853 = 52886
Step 63: 52886 + 853 = 53739
Step 64: 53739 + 853 = 54592
Step 65: 54592 + 853 = 55445
Step 66: 55445 + 853 = 56298
Step 67: 56298 + 853 = 57151
Step 68: 57151 + 853 = 58004
Step 69: 58004 + 853 = 58857
Step 70: 58857 + 853 = 59710
Step 71: 59710 + 853 = 60563
Step 72: 60563 + 853 = 61416
Step 73: 61416 + 853 = 62269
Step 74: 62269 + 853 = 63122
Step 75: 63122 + 853 = 63975
Step 76: 63975 + 853 = 64828
Step 77: 64828 + 853 = 65681
Step 78: 65681 + 853 = 66534
Step 79: 66534 + 853 = 67387
Step 80: 67387 + 853 = 68240
Step 81: 68240 + 853 = 69093
Step 82: 69093 + 853 = 69946
Step 83: 69946 + 853 = 70799
Step 84: 70799 + 853 = 71652
Step 85: 71652 + 853 = 72505
Step 86: 72505 + 853 = 73358
Step 87: 73358 + 853 = 74211
Step 88: 74211 + 853 = 75064
Step 89: 75064 + 853 = 75917
Step 90: 75917 + 853 = 76770
Step 91: 76770 + 853 = 77623
Step 92: 77623 + 853 = 78476
Step 93: 78476 + 853 = 79329
Step 94: 79329 + 853 = 80182
Step 95: 80182 + 853 = 81035
Step 96: 81035 + 853 = 81888
Step 97: 81888 + 853 = 82741
Step 98: 82741 + 853 = 83594
Step 99: 83594 + 853 = 84447
Step 100: 84447 + 853 = 85300
Step 101: 85300 + 853 = 86153
Step 102: 86153 + 853 = 87006
Step 103: 87006 + 853 = 87859
Step 104: 87859 + 853 = 88712
Step 105: 88712 + 853 = 89565
Step 106: 89565 + 853 = 90418
Step 107: 90418 + 853 = 91271
Step 108: 91271 + 853 = 92124
Step 109: 92124 + 853 = 92977
Step 110: 92977 + 853 = 93830
Step 111: 93830 + 853 = 94683
Step 112: 94683 + 853 = 95536
Step 113: 95536 + 853 = 96389
Step 114: 96389 + 853 = 97242
Step 115: 97242 + 853 = 98095
Step 116: 98095 + 853 = 98948
Step 117: 98948 + 853 = 99801
Step 118: 99801 + 853 = 100654
Step 119: 100654 + 853 = 101507
Step 120: 101507 + 853 = 102360
Step 121: 102360 + 853 = 103213
Step 122: 103213 + 853 = 104066
Step 123: 104066 + 853 = 104919
Step 124: 104919 + 853 = 105772
Step 125: 105772 + 853 = 106625
Step 126: 106625 + 853 = 107478
Step 127: 107478 + 853 = 108331
Step 128: 108331 + 853 = 109184
Step 129: 109184 + 853 = 110037
Step 130: 110037 + 853 = 110890
Step 131: 110890 + 853 = 111743
Step 132: 111743 + 853 = 112596
Step 133: 112596 + 853 = 113449
Step 134: 113449 + 853 = 114302
Step 135: 114302 + 853 = 115155
Step 136: 115155 + 853 = 116008
Step 137: 116008 + 853 = 116861
Step 138: 116861 + 853 = 117714
Step 139: 117714 + 853 = 118567
Step 140: 118567 + 853 = 119420
Step 141: 119420 + 853 = 120273
Step 142: 120273 + 853 = 121126
Step 143: 121126 + 853 = 121979
Step 144: 121979 + 853 = 122832
Step 145: 122832 + 853 = 123685
Step 146: 123685 + 853 = 124538
Step 147: 124538 + 853 = 125391
Step 148: 125391 + 853 = 126244
Step 149: 126244 + 853 = 127097
Step 150: 127097 + 853 = 127950
Step 151: 127950 + 853 = 128803
Step 152: 128803 + 853 = 129656
Step 153: 129656 + 853 = 130509
Step 154: 130509 + 853 = 131362
Step 155: 131362 + 853 = 132215
Step 156: 132215 + 853 = 133068
Step 157: 133068 + 853 = 133921
Step 158: 133921 + 853 = 134774
Step 159: 134774 + 853 = 135627
Step 160: 135627 + 853 = 136480
Step 161: 136480 + 853 = 137333
Step 162: 137333 + 853 = 138186
Step 163: 138186 + 853 = 139039
Step 164: 139039 + 853 = 139892
Step 165: 139892 + 853 = 140745
Step 166: 140745 + 853 = 141598
Step 167: 141598 + 853 = 142451
Step 168: 142451 + 853 = 143304
Step 169: 143304 + 853 = 144157
Step 170: 144157 + 853 = 145010
Step 171: 145010 + 853 = 145863
Step 172: 145863 + 853 = 146716
Step 173: 146716 + 853 = 147569
Step 174: 147569 + 853 = 148422
Step 175: 148422 + 853 = 149275
Step 176: 149275 + 853 = 150128
Step 177: 150128 + 853 = 150981
Step 178: 150981 + 853 = 151834
Step 179: 151834 + 853 = 152687
Step 180: 152687 + 853 = 153540
Step 181: 153540 + 853 = 154393
Step 182: 154393 + 853 = 155246
Step 183: 155246 + 853 = 156099
Step 184: 156099 + 853 = 156952
Step 185: 156952 + 853 = 157805
Step 186: 157805 + 853 = 158658
Step 187: 158658 + 853 = 159511
Step 188: 159511 + 853 = 160364
Step 189: 160364 + 853 = 161217
Step 190: 161217 + 853 = 162070
Step 191: 162070 + 853 = 162923
Step 192: 162923 + 853 = 163776
Step 193: 163776 + 853 = 164629
Step 194: 164629 + 853 = 165482
Step 195: 165482 + 853 = 166335
Step 196: 166335 + 853 = 167188
Step 197: 167188 + 853 = 168041
Step 198: 168041 + 853 = 168894
Step 199: 168894 + 853 = 169747
Step 200: 169747 + 853 = 170600
Step 201: 170600 + 853 = 171453
Step 202: 171453 + 853 = 172306
Step 203: 172306 + 853 = 173159
Step 204: 173159 + 853 = 174012
Step 205: 174012 + 853 = 174865
Step 206: 174865 + 853 = 175718
Step 207: 175718 + 853 = 176571
Step 208: 176571 + 853 = 177424
Step 209: 177424 + 853 = 178277
Step 210: 178277 + 853 = 179130
Step 211: 179130 + 853 = 179983
Step 212: 179983 + 853 = 180836
Step 213: 180836 + 853 = 181689
Step 214: 181689 + 853 = 182542
Step 215: 182542 + 853 = 183395
Step 216: 183395 + 853 = 184248
Step 217: 184248 + 853 = 185101
Step 218: 185101 + 853 = 185954
Step 219: 185954 + 853 = 186807
Step 220: 186807 + 853 = 187660
Step 221: 187660 + 853 = 188513
Step 222: 188513 + 853 = 189366
Step 223: 189366 + 853 = 190219
Step 224: 190219 + 853 = 191072
Step 225: 191072 + 853 = 191925
Step 226: 191925 + 853 = 192778
Step 227: 192778 + 853 = 193631
Step 228: 193631 + 853 = 194484
Step 229: 194484 + 853 = 195337
Step 230: 195337 + 853 = 196190
Step 231: 196190 + 853 = 197043
Step 232: 197043 + 853 = 197896
Step 233: 197896 + 853 = 198749
Step 234: 198749 + 853 = 199602
Step 235: 199602 + 853 = 200455
Step 236: 200455 + 853 = 201308
Step 237: 201308 + 853 = 202161
Step 238: 202161 + 853 = 203014
Step 239: 203014 + 853 = 203867
Step 240: 203867 + 853 = 204720
Step 241: 204720 + 853 = 205573
Step 242: 205573 + 853 = 206426
Step 243: 206426 + 853 = 207279
Step 244: 207279 + 853 = 208132
Step 245: 208132 + 853 = 208985
Step 246: 208985 + 853 = 209838
Step 247: 209838 + 853 = 210691
Step 248: 210691 + 853 = 211544
Step 249: 211544 + 853 = 212397
Step 250: 212397 + 853 = 213250
Step 251: 213250 + 853 = 214103
Step 252: 214103 + 853 = 214956
Step 253: 214956 + 853 = 215809
Step 254: 215809 + 853 = 216662
Step 255: 216662 + 853 = 217515
Step 256: 217515 + 853 = 218368
Step 257: 218368 + 853 = 219221
Step 258: 219221 + 853 = 220074
Step 259: 220074 + 853 = 220927
Step 260: 220927 + 853 = 221780
Step 261: 221780 + 853 = 222633
Step 262: 222633 + 853 = 223486
Step 263: 223486 + 853 = 224339
Step 264: 224339 + 853 = 225192
Step 265: 225192 + 853 = 226045
Step 266: 226045 + 853 = 226898
Step 267: 226898 + 853 = 227751
Step 268: 227751 + 853 = 228604
Step 269: 228604 + 853 = 229457
Step 270: 229457 + 853 = 230310
Step 271: 230310 + 853 = 231163
Step 272: 231163 + 853 = 232016
Step 273: 232016 + 853 = 232869
Step 274: 232869 + 853 = 233722
Step 275: 233722 + 853 = 234575
Step 276: 234575 + 853 = 235428
Step 277: 235428 + 853 = 236281
Step 278: 236281 + 853 = 237134
Step 279: 237134 + 853 = 237987
Step 280: 237987 + 853 = 238840
Step 281: 238840 + 853 = 239693
Step 282: 239693 + 853 = 240546
Step 283: 240546 + 853 = 241399
Step 284: 241399 + 853 = 242252
Step 285: 242252 + 853 = 243105
Step 286: 243105 + 853 = 243958
Step 287: 243958 + 853 = 244811
Step 288: 244811 + 853 = 245664
Step 289: 245664 + 853 = 246517
Step 290: 246517 + 853 = 247370
Step 291: 247370 + 853 = 248223
Step 292: 248223 + 853 = 249076
Step 293: 249076 + 853 = 249929
Step 294: 249929 + 853 = 250782
Step 295: 250782 + 853 = 251635
Step 296: 251635 + 853 = 252488
Step 297: 252488 + 853 = 253341
Step 298: 253341 + 853 = 254194
Step 299: 254194 + 853 = 255047
Step 300: 255047 + 853 = 255900
Step 301: 255900 + 853 = 256753
Step 302: 256753 + 853 = 257606
Step 303: 257606 + 853 = 258459
Step 304: 258459 + 853 = 259312
Step 305: 259312 + 853 = 260165
Step 306: 260165 + 853 = 261018
Step 307: 261018 + 853 = 261871
Step 308: 261871 + 853 = 262724
Step 309: 262724 + 853 = 263577
Step 310: 263577 + 853 = 264430
Step 311: 264430 + 853 = 265283
Step 312: 265283 + 853 = 266136
Step 313: 266136 + 853 = 266989
Step 314: 266989 + 853 = 267842
Step 315: 267842 + 853 = 268695
Step 316: 268695 + 853 = 269548
Step 317: 269548 + 853 = 270401
Step 318: 270401 + 853 = 271254
Step 319: 271254 + 853 = 272107
Step 320: 272107 + 853 = 272960
Step 321: 272960 + 853 = 273813
Step 322: 273813 + 853 = 274666
Step 323: 274666 + 853 = 275519
Step 324: 275519 + 853 = 276372
Step 325: 276372 + 853 = 277225
Step 326: 277225 + 853 = 278078
Step 327: 278078 + 853 = 278931
Step 328: 278931 + 853 = 279784
Step 329: 279784 + 853 = 280637
Step 330: 280637 + 853 = 281490
Step 331: 281490 + 853 = 282343
Step 332: 282343 + 853 = 283196
Step 333: 283196 + 853 = 284049
Step 334: 284049 + 853 = 284902
Step 335: 284902 + 853 = 285755
Step 336: 285755 + 853 = 286608
Step 337: 286608 + 853 = 287461
Step 338: 287461 + 853 = 288314
Step 339: 288314 + 853 = 289167
Step 340: 289167 + 853 = 290020
Step 341: 290020 + 853 = 290873
Step 342: 290873 + 853 = 291726
Step 343: 291726 + 853 = 292579
Step 344: 292579 + 853 = 293432
Step 345: 293432 + 853 = 294285
Step 346: 294285 + 853 = 295138
Step 347: 295138 + 853 = 295991
Step 348: 295991 + 853 = 296844
Step 349: 296844 + 853 = 297697
Step 350: 297697 + 853 = 298550
Step 351: 298550 + 853 = 299403
Step 352: 299403 + 853 = 300256
Step 353: 300256 + 853 = 301109
Step 354: 301109 + 853 = 301962
Step 355: 301962 + 853 = 302815
Step 356: 302815 + 853 = 303668
Step 357: 303668 + 853 = 304521
Step 358: 304521 + 853 = 305374
Step 359: 305374 + 853 = 306227
Step 360: 306227 + 853 = 307080
Step 361: 307080 + 853 = 307933
Step 362: 307933 + 853 = 308786
Step 363: 308786 + 853 = 309639
Step 364: 309639 + 853 = 310492
Step 365: 310492 + 853 = 311345
Step 366: 311345 + 853 = 312198
Step 367: 312198 + 853 = 313051
Step 368: 313051 + 853 = 313904
Step 369: 313904 + 853 = 314757
Step 370: 314757 + 853 = 315610
Step 371: 315610 + 853 = 316463
Step 372: 316463 + 853 = 317316
Step 373: 317316 + 853 = 318169
Step 374: 318169 + 853 = 319022
Step 375: 319022 + 853 = 319875
Step 376: 319875 + 853 = 320728
Step 377: 320728 + 853 = 321581
Step 378: 321581 + 853 = 322434
Step 379: 322434 + 853 = 323287
Step 380: 323287 + 853 = 324140
Step 381: 324140 + 853 = 324993
Step 382: 324993 + 853 = 325846
Step 383: 325846 + 853 = 326699
Step 384: 326699 + 853 = 327552
Step 385: 327552 + 853 = 328405
Step 386: 328405 + 853 = 329258
Step 387: 329258 + 853 = 330111
Step 388: 330111 + 853 = 330964
Step 389: 330964 + 853 = 331817
Step 390: 331817 + 853 = 332670
Step 391: 332670 + 853 = 333523
Step 392: 333523 + 853 = 334376
Step 393: 334376 + 853 = 335229
Step 394: 335229 + 853 = 336082
Step 395: 336082 + 853 = 336935
Step 396: 336935 + 853 = 337788
Step 397: 337788 + 853 = 338641
Step 398: 338641 + 853 = 339494
Step 399: 339494 + 853 = 340347
Step 400: 340347 + 853 = 341200
Step 401: 341200 + 853 = 342053
Step 402: 342053 + 853 = 342906
Step 403: 342906 + 853 = 343759
Step 404: 343759 + 853 = 344612
Step 405: 344612 + 853 = 345465
Step 406: 345465 + 853 = 346318
Step 407: 346318 + 853 = 347171
Step 408: 347171 + 853 = 348024
Step 409: 348024 + 853 = 348877
Step 410: 348877 + 853 = 349730
Step 411: 349730 + 853 = 350583
Step 412: 350583 + 853 = 351436
Step 413: 351436 + 853 = 352289
Step 414: 352289 + 853 = 353142
Step 415: 353142 + 853 = 353995
Step 416: 353995 + 853 = 354848
Step 417: 354848 + 853 = 355701
Step 418: 355701 + 853 = 356554
Step 419: 356554 + 853 = 357407
Step 420: 357407 + 853 = 358260
Step 421: 358260 + 853 = 359113
Step 422: 359113 + 853 = 359966
Step 423: 359966 + 853 = 360819
Step 424: 360819 + 853 = 361672
Step 425: 361672 + 853 = 362525
Step 426: 362525 + 853 = 363378
Step 427: 363378 + 853 = 364231
Step 428: 364231 + 853 = 365084
Step 429: 365084 + 853 = 365937
Step 430: 365937 + 853 = 366790
Step 431: 366790 + 853 = 367643
Step 432: 367643 + 853 = 368496
Step 433: 368496 + 853 = 369349
Step 434: 369349 + 853 = 370202
Step 435: 370202 + 853 = 371055
Step 436: 371055 + 853 = 371908
Step 437: 371908 + 853 = 372761
Step 438: 372761 + 853 = 373614
Step 439: 373614 + 853 = 374467
Step 440: 374467 + 853 = 375320
Step 441: 375320 + 853 = 376173
Step 442: 376173 + 853 = 377026
Step 443: 377026 + 853 = 377879
Step 444: 377879 + 853 = 378732
Step 445: 378732 + 853 = 379585
Step 446: 379585 + 853 = 380438
Step 447: 380438 + 853 = 381291
Step 448: 381291 + 853 = 382144
Step 449: 382144 + 853 = 382997
Step 450: 382997 + 853 = 383850
Step 451: 383850 + 853 = 384703
Step 452: 384703 + 853 = 385556
Step 453: 385556 + 853 = 386409
Step 454: 386409 + 853 = 387262
Step 455: 387262 + 853 = 388115
Step 456: 388115 + 853 = 388968
Step 457: 388968 + 853 = 389821
Step 458: 389821 + 853 = 390674
Step 459: 390674 + 853 = 391527
Step 460: 391527 + 853 = 392380
Step 461: 392380 + 853 = 393233
Step 462: 393233 + 853 = 394086
Step 463: 394086 + 853 = 394939
Step 464: 394939 + 853 = 395792
Step 465: 395792 + 853 = 396645
Step 466: 396645 + 853 = 397498
Step 467: 397498 + 853 = 398351
Step 468: 398351 + 853 = 399204
Step 469: 399204 + 853 = 400057
Step 470: 400057 + 853 = 400910
Step 471: 400910 + 853 = 401763
Step 472: 401763 + 853 = 402616
Step 473: 402616 + 853 = 403469
Step 474: 403469 + 853 = 404322
Step 475: 404322 + 853 = 405175
Step 476: 405175 + 853 = 406028
Step 477: 406028 + 853 = 406881
Step 478: 406881 + 853 = 407734
Step 479: 407734 + 853 = 408587
Step 480: 408587 + 853 = 409440
Step 481: 409440 + 853 = 410293
Step 482: 410293 + 853 = 411146
Step 483: 411146 + 853 = 411999
Step 484: 411999 + 853 = 412852
Step 485: 412852 + 853 = 413705
Step 486: 413705 + 853 = 414558
Step 487: 414558 + 853 = 415411
Step 488: 415411 + 853 = 416264
Step 489: 416264 + 853 = 417117
Step 490: 417117 + 853 = 417970

So, 853*490 = 417970