OK, let's work through this together. We're starting with 844 and we're going to multiply it by 424, which means we add 844 to itself 424 times.
Step 1: 0 + 844 = 844
Step 2: 844 + 844 = 1688
Step 3: 1688 + 844 = 2532
Step 4: 2532 + 844 = 3376
Step 5: 3376 + 844 = 4220
Step 6: 4220 + 844 = 5064
Step 7: 5064 + 844 = 5908
Step 8: 5908 + 844 = 6752
Step 9: 6752 + 844 = 7596
Step 10: 7596 + 844 = 8440
Step 11: 8440 + 844 = 9284
Step 12: 9284 + 844 = 10128
Step 13: 10128 + 844 = 10972
Step 14: 10972 + 844 = 11816
Step 15: 11816 + 844 = 12660
Step 16: 12660 + 844 = 13504
Step 17: 13504 + 844 = 14348
Step 18: 14348 + 844 = 15192
Step 19: 15192 + 844 = 16036
Step 20: 16036 + 844 = 16880
Step 21: 16880 + 844 = 17724
Step 22: 17724 + 844 = 18568
Step 23: 18568 + 844 = 19412
Step 24: 19412 + 844 = 20256
Step 25: 20256 + 844 = 21100
Step 26: 21100 + 844 = 21944
Step 27: 21944 + 844 = 22788
Step 28: 22788 + 844 = 23632
Step 29: 23632 + 844 = 24476
Step 30: 24476 + 844 = 25320
Step 31: 25320 + 844 = 26164
Step 32: 26164 + 844 = 27008
Step 33: 27008 + 844 = 27852
Step 34: 27852 + 844 = 28696
Step 35: 28696 + 844 = 29540
Step 36: 29540 + 844 = 30384
Step 37: 30384 + 844 = 31228
Step 38: 31228 + 844 = 32072
Step 39: 32072 + 844 = 32916
Step 40: 32916 + 844 = 33760
Step 41: 33760 + 844 = 34604
Step 42: 34604 + 844 = 35448
Step 43: 35448 + 844 = 36292
Step 44: 36292 + 844 = 37136
Step 45: 37136 + 844 = 37980
Step 46: 37980 + 844 = 38824
Step 47: 38824 + 844 = 39668
Step 48: 39668 + 844 = 40512
Step 49: 40512 + 844 = 41356
Step 50: 41356 + 844 = 42200
Step 51: 42200 + 844 = 43044
Step 52: 43044 + 844 = 43888
Step 53: 43888 + 844 = 44732
Step 54: 44732 + 844 = 45576
Step 55: 45576 + 844 = 46420
Step 56: 46420 + 844 = 47264
Step 57: 47264 + 844 = 48108
Step 58: 48108 + 844 = 48952
Step 59: 48952 + 844 = 49796
Step 60: 49796 + 844 = 50640
Step 61: 50640 + 844 = 51484
Step 62: 51484 + 844 = 52328
Step 63: 52328 + 844 = 53172
Step 64: 53172 + 844 = 54016
Step 65: 54016 + 844 = 54860
Step 66: 54860 + 844 = 55704
Step 67: 55704 + 844 = 56548
Step 68: 56548 + 844 = 57392
Step 69: 57392 + 844 = 58236
Step 70: 58236 + 844 = 59080
Step 71: 59080 + 844 = 59924
Step 72: 59924 + 844 = 60768
Step 73: 60768 + 844 = 61612
Step 74: 61612 + 844 = 62456
Step 75: 62456 + 844 = 63300
Step 76: 63300 + 844 = 64144
Step 77: 64144 + 844 = 64988
Step 78: 64988 + 844 = 65832
Step 79: 65832 + 844 = 66676
Step 80: 66676 + 844 = 67520
Step 81: 67520 + 844 = 68364
Step 82: 68364 + 844 = 69208
Step 83: 69208 + 844 = 70052
Step 84: 70052 + 844 = 70896
Step 85: 70896 + 844 = 71740
Step 86: 71740 + 844 = 72584
Step 87: 72584 + 844 = 73428
Step 88: 73428 + 844 = 74272
Step 89: 74272 + 844 = 75116
Step 90: 75116 + 844 = 75960
Step 91: 75960 + 844 = 76804
Step 92: 76804 + 844 = 77648
Step 93: 77648 + 844 = 78492
Step 94: 78492 + 844 = 79336
Step 95: 79336 + 844 = 80180
Step 96: 80180 + 844 = 81024
Step 97: 81024 + 844 = 81868
Step 98: 81868 + 844 = 82712
Step 99: 82712 + 844 = 83556
Step 100: 83556 + 844 = 84400
Step 101: 84400 + 844 = 85244
Step 102: 85244 + 844 = 86088
Step 103: 86088 + 844 = 86932
Step 104: 86932 + 844 = 87776
Step 105: 87776 + 844 = 88620
Step 106: 88620 + 844 = 89464
Step 107: 89464 + 844 = 90308
Step 108: 90308 + 844 = 91152
Step 109: 91152 + 844 = 91996
Step 110: 91996 + 844 = 92840
Step 111: 92840 + 844 = 93684
Step 112: 93684 + 844 = 94528
Step 113: 94528 + 844 = 95372
Step 114: 95372 + 844 = 96216
Step 115: 96216 + 844 = 97060
Step 116: 97060 + 844 = 97904
Step 117: 97904 + 844 = 98748
Step 118: 98748 + 844 = 99592
Step 119: 99592 + 844 = 100436
Step 120: 100436 + 844 = 101280
Step 121: 101280 + 844 = 102124
Step 122: 102124 + 844 = 102968
Step 123: 102968 + 844 = 103812
Step 124: 103812 + 844 = 104656
Step 125: 104656 + 844 = 105500
Step 126: 105500 + 844 = 106344
Step 127: 106344 + 844 = 107188
Step 128: 107188 + 844 = 108032
Step 129: 108032 + 844 = 108876
Step 130: 108876 + 844 = 109720
Step 131: 109720 + 844 = 110564
Step 132: 110564 + 844 = 111408
Step 133: 111408 + 844 = 112252
Step 134: 112252 + 844 = 113096
Step 135: 113096 + 844 = 113940
Step 136: 113940 + 844 = 114784
Step 137: 114784 + 844 = 115628
Step 138: 115628 + 844 = 116472
Step 139: 116472 + 844 = 117316
Step 140: 117316 + 844 = 118160
Step 141: 118160 + 844 = 119004
Step 142: 119004 + 844 = 119848
Step 143: 119848 + 844 = 120692
Step 144: 120692 + 844 = 121536
Step 145: 121536 + 844 = 122380
Step 146: 122380 + 844 = 123224
Step 147: 123224 + 844 = 124068
Step 148: 124068 + 844 = 124912
Step 149: 124912 + 844 = 125756
Step 150: 125756 + 844 = 126600
Step 151: 126600 + 844 = 127444
Step 152: 127444 + 844 = 128288
Step 153: 128288 + 844 = 129132
Step 154: 129132 + 844 = 129976
Step 155: 129976 + 844 = 130820
Step 156: 130820 + 844 = 131664
Step 157: 131664 + 844 = 132508
Step 158: 132508 + 844 = 133352
Step 159: 133352 + 844 = 134196
Step 160: 134196 + 844 = 135040
Step 161: 135040 + 844 = 135884
Step 162: 135884 + 844 = 136728
Step 163: 136728 + 844 = 137572
Step 164: 137572 + 844 = 138416
Step 165: 138416 + 844 = 139260
Step 166: 139260 + 844 = 140104
Step 167: 140104 + 844 = 140948
Step 168: 140948 + 844 = 141792
Step 169: 141792 + 844 = 142636
Step 170: 142636 + 844 = 143480
Step 171: 143480 + 844 = 144324
Step 172: 144324 + 844 = 145168
Step 173: 145168 + 844 = 146012
Step 174: 146012 + 844 = 146856
Step 175: 146856 + 844 = 147700
Step 176: 147700 + 844 = 148544
Step 177: 148544 + 844 = 149388
Step 178: 149388 + 844 = 150232
Step 179: 150232 + 844 = 151076
Step 180: 151076 + 844 = 151920
Step 181: 151920 + 844 = 152764
Step 182: 152764 + 844 = 153608
Step 183: 153608 + 844 = 154452
Step 184: 154452 + 844 = 155296
Step 185: 155296 + 844 = 156140
Step 186: 156140 + 844 = 156984
Step 187: 156984 + 844 = 157828
Step 188: 157828 + 844 = 158672
Step 189: 158672 + 844 = 159516
Step 190: 159516 + 844 = 160360
Step 191: 160360 + 844 = 161204
Step 192: 161204 + 844 = 162048
Step 193: 162048 + 844 = 162892
Step 194: 162892 + 844 = 163736
Step 195: 163736 + 844 = 164580
Step 196: 164580 + 844 = 165424
Step 197: 165424 + 844 = 166268
Step 198: 166268 + 844 = 167112
Step 199: 167112 + 844 = 167956
Step 200: 167956 + 844 = 168800
Step 201: 168800 + 844 = 169644
Step 202: 169644 + 844 = 170488
Step 203: 170488 + 844 = 171332
Step 204: 171332 + 844 = 172176
Step 205: 172176 + 844 = 173020
Step 206: 173020 + 844 = 173864
Step 207: 173864 + 844 = 174708
Step 208: 174708 + 844 = 175552
Step 209: 175552 + 844 = 176396
Step 210: 176396 + 844 = 177240
Step 211: 177240 + 844 = 178084
Step 212: 178084 + 844 = 178928
Step 213: 178928 + 844 = 179772
Step 214: 179772 + 844 = 180616
Step 215: 180616 + 844 = 181460
Step 216: 181460 + 844 = 182304
Step 217: 182304 + 844 = 183148
Step 218: 183148 + 844 = 183992
Step 219: 183992 + 844 = 184836
Step 220: 184836 + 844 = 185680
Step 221: 185680 + 844 = 186524
Step 222: 186524 + 844 = 187368
Step 223: 187368 + 844 = 188212
Step 224: 188212 + 844 = 189056
Step 225: 189056 + 844 = 189900
Step 226: 189900 + 844 = 190744
Step 227: 190744 + 844 = 191588
Step 228: 191588 + 844 = 192432
Step 229: 192432 + 844 = 193276
Step 230: 193276 + 844 = 194120
Step 231: 194120 + 844 = 194964
Step 232: 194964 + 844 = 195808
Step 233: 195808 + 844 = 196652
Step 234: 196652 + 844 = 197496
Step 235: 197496 + 844 = 198340
Step 236: 198340 + 844 = 199184
Step 237: 199184 + 844 = 200028
Step 238: 200028 + 844 = 200872
Step 239: 200872 + 844 = 201716
Step 240: 201716 + 844 = 202560
Step 241: 202560 + 844 = 203404
Step 242: 203404 + 844 = 204248
Step 243: 204248 + 844 = 205092
Step 244: 205092 + 844 = 205936
Step 245: 205936 + 844 = 206780
Step 246: 206780 + 844 = 207624
Step 247: 207624 + 844 = 208468
Step 248: 208468 + 844 = 209312
Step 249: 209312 + 844 = 210156
Step 250: 210156 + 844 = 211000
Step 251: 211000 + 844 = 211844
Step 252: 211844 + 844 = 212688
Step 253: 212688 + 844 = 213532
Step 254: 213532 + 844 = 214376
Step 255: 214376 + 844 = 215220
Step 256: 215220 + 844 = 216064
Step 257: 216064 + 844 = 216908
Step 258: 216908 + 844 = 217752
Step 259: 217752 + 844 = 218596
Step 260: 218596 + 844 = 219440
Step 261: 219440 + 844 = 220284
Step 262: 220284 + 844 = 221128
Step 263: 221128 + 844 = 221972
Step 264: 221972 + 844 = 222816
Step 265: 222816 + 844 = 223660
Step 266: 223660 + 844 = 224504
Step 267: 224504 + 844 = 225348
Step 268: 225348 + 844 = 226192
Step 269: 226192 + 844 = 227036
Step 270: 227036 + 844 = 227880
Step 271: 227880 + 844 = 228724
Step 272: 228724 + 844 = 229568
Step 273: 229568 + 844 = 230412
Step 274: 230412 + 844 = 231256
Step 275: 231256 + 844 = 232100
Step 276: 232100 + 844 = 232944
Step 277: 232944 + 844 = 233788
Step 278: 233788 + 844 = 234632
Step 279: 234632 + 844 = 235476
Step 280: 235476 + 844 = 236320
Step 281: 236320 + 844 = 237164
Step 282: 237164 + 844 = 238008
Step 283: 238008 + 844 = 238852
Step 284: 238852 + 844 = 239696
Step 285: 239696 + 844 = 240540
Step 286: 240540 + 844 = 241384
Step 287: 241384 + 844 = 242228
Step 288: 242228 + 844 = 243072
Step 289: 243072 + 844 = 243916
Step 290: 243916 + 844 = 244760
Step 291: 244760 + 844 = 245604
Step 292: 245604 + 844 = 246448
Step 293: 246448 + 844 = 247292
Step 294: 247292 + 844 = 248136
Step 295: 248136 + 844 = 248980
Step 296: 248980 + 844 = 249824
Step 297: 249824 + 844 = 250668
Step 298: 250668 + 844 = 251512
Step 299: 251512 + 844 = 252356
Step 300: 252356 + 844 = 253200
Step 301: 253200 + 844 = 254044
Step 302: 254044 + 844 = 254888
Step 303: 254888 + 844 = 255732
Step 304: 255732 + 844 = 256576
Step 305: 256576 + 844 = 257420
Step 306: 257420 + 844 = 258264
Step 307: 258264 + 844 = 259108
Step 308: 259108 + 844 = 259952
Step 309: 259952 + 844 = 260796
Step 310: 260796 + 844 = 261640
Step 311: 261640 + 844 = 262484
Step 312: 262484 + 844 = 263328
Step 313: 263328 + 844 = 264172
Step 314: 264172 + 844 = 265016
Step 315: 265016 + 844 = 265860
Step 316: 265860 + 844 = 266704
Step 317: 266704 + 844 = 267548
Step 318: 267548 + 844 = 268392
Step 319: 268392 + 844 = 269236
Step 320: 269236 + 844 = 270080
Step 321: 270080 + 844 = 270924
Step 322: 270924 + 844 = 271768
Step 323: 271768 + 844 = 272612
Step 324: 272612 + 844 = 273456
Step 325: 273456 + 844 = 274300
Step 326: 274300 + 844 = 275144
Step 327: 275144 + 844 = 275988
Step 328: 275988 + 844 = 276832
Step 329: 276832 + 844 = 277676
Step 330: 277676 + 844 = 278520
Step 331: 278520 + 844 = 279364
Step 332: 279364 + 844 = 280208
Step 333: 280208 + 844 = 281052
Step 334: 281052 + 844 = 281896
Step 335: 281896 + 844 = 282740
Step 336: 282740 + 844 = 283584
Step 337: 283584 + 844 = 284428
Step 338: 284428 + 844 = 285272
Step 339: 285272 + 844 = 286116
Step 340: 286116 + 844 = 286960
Step 341: 286960 + 844 = 287804
Step 342: 287804 + 844 = 288648
Step 343: 288648 + 844 = 289492
Step 344: 289492 + 844 = 290336
Step 345: 290336 + 844 = 291180
Step 346: 291180 + 844 = 292024
Step 347: 292024 + 844 = 292868
Step 348: 292868 + 844 = 293712
Step 349: 293712 + 844 = 294556
Step 350: 294556 + 844 = 295400
Step 351: 295400 + 844 = 296244
Step 352: 296244 + 844 = 297088
Step 353: 297088 + 844 = 297932
Step 354: 297932 + 844 = 298776
Step 355: 298776 + 844 = 299620
Step 356: 299620 + 844 = 300464
Step 357: 300464 + 844 = 301308
Step 358: 301308 + 844 = 302152
Step 359: 302152 + 844 = 302996
Step 360: 302996 + 844 = 303840
Step 361: 303840 + 844 = 304684
Step 362: 304684 + 844 = 305528
Step 363: 305528 + 844 = 306372
Step 364: 306372 + 844 = 307216
Step 365: 307216 + 844 = 308060
Step 366: 308060 + 844 = 308904
Step 367: 308904 + 844 = 309748
Step 368: 309748 + 844 = 310592
Step 369: 310592 + 844 = 311436
Step 370: 311436 + 844 = 312280
Step 371: 312280 + 844 = 313124
Step 372: 313124 + 844 = 313968
Step 373: 313968 + 844 = 314812
Step 374: 314812 + 844 = 315656
Step 375: 315656 + 844 = 316500
Step 376: 316500 + 844 = 317344
Step 377: 317344 + 844 = 318188
Step 378: 318188 + 844 = 319032
Step 379: 319032 + 844 = 319876
Step 380: 319876 + 844 = 320720
Step 381: 320720 + 844 = 321564
Step 382: 321564 + 844 = 322408
Step 383: 322408 + 844 = 323252
Step 384: 323252 + 844 = 324096
Step 385: 324096 + 844 = 324940
Step 386: 324940 + 844 = 325784
Step 387: 325784 + 844 = 326628
Step 388: 326628 + 844 = 327472
Step 389: 327472 + 844 = 328316
Step 390: 328316 + 844 = 329160
Step 391: 329160 + 844 = 330004
Step 392: 330004 + 844 = 330848
Step 393: 330848 + 844 = 331692
Step 394: 331692 + 844 = 332536
Step 395: 332536 + 844 = 333380
Step 396: 333380 + 844 = 334224
Step 397: 334224 + 844 = 335068
Step 398: 335068 + 844 = 335912
Step 399: 335912 + 844 = 336756
Step 400: 336756 + 844 = 337600
Step 401: 337600 + 844 = 338444
Step 402: 338444 + 844 = 339288
Step 403: 339288 + 844 = 340132
Step 404: 340132 + 844 = 340976
Step 405: 340976 + 844 = 341820
Step 406: 341820 + 844 = 342664
Step 407: 342664 + 844 = 343508
Step 408: 343508 + 844 = 344352
Step 409: 344352 + 844 = 345196
Step 410: 345196 + 844 = 346040
Step 411: 346040 + 844 = 346884
Step 412: 346884 + 844 = 347728
Step 413: 347728 + 844 = 348572
Step 414: 348572 + 844 = 349416
Step 415: 349416 + 844 = 350260
Step 416: 350260 + 844 = 351104
Step 417: 351104 + 844 = 351948
Step 418: 351948 + 844 = 352792
Step 419: 352792 + 844 = 353636
Step 420: 353636 + 844 = 354480
Step 421: 354480 + 844 = 355324
Step 422: 355324 + 844 = 356168
Step 423: 356168 + 844 = 357012
Step 424: 357012 + 844 = 357856

So, 844*424 = 357856