Sure thing, let's get straight to it. We start with 953 and we're going to multiply it by 421, which means adding 953 to itself 421 times.
Step 1: 0 + 953 = 953
Step 2: 953 + 953 = 1906
Step 3: 1906 + 953 = 2859
Step 4: 2859 + 953 = 3812
Step 5: 3812 + 953 = 4765
Step 6: 4765 + 953 = 5718
Step 7: 5718 + 953 = 6671
Step 8: 6671 + 953 = 7624
Step 9: 7624 + 953 = 8577
Step 10: 8577 + 953 = 9530
Step 11: 9530 + 953 = 10483
Step 12: 10483 + 953 = 11436
Step 13: 11436 + 953 = 12389
Step 14: 12389 + 953 = 13342
Step 15: 13342 + 953 = 14295
Step 16: 14295 + 953 = 15248
Step 17: 15248 + 953 = 16201
Step 18: 16201 + 953 = 17154
Step 19: 17154 + 953 = 18107
Step 20: 18107 + 953 = 19060
Step 21: 19060 + 953 = 20013
Step 22: 20013 + 953 = 20966
Step 23: 20966 + 953 = 21919
Step 24: 21919 + 953 = 22872
Step 25: 22872 + 953 = 23825
Step 26: 23825 + 953 = 24778
Step 27: 24778 + 953 = 25731
Step 28: 25731 + 953 = 26684
Step 29: 26684 + 953 = 27637
Step 30: 27637 + 953 = 28590
Step 31: 28590 + 953 = 29543
Step 32: 29543 + 953 = 30496
Step 33: 30496 + 953 = 31449
Step 34: 31449 + 953 = 32402
Step 35: 32402 + 953 = 33355
Step 36: 33355 + 953 = 34308
Step 37: 34308 + 953 = 35261
Step 38: 35261 + 953 = 36214
Step 39: 36214 + 953 = 37167
Step 40: 37167 + 953 = 38120
Step 41: 38120 + 953 = 39073
Step 42: 39073 + 953 = 40026
Step 43: 40026 + 953 = 40979
Step 44: 40979 + 953 = 41932
Step 45: 41932 + 953 = 42885
Step 46: 42885 + 953 = 43838
Step 47: 43838 + 953 = 44791
Step 48: 44791 + 953 = 45744
Step 49: 45744 + 953 = 46697
Step 50: 46697 + 953 = 47650
Step 51: 47650 + 953 = 48603
Step 52: 48603 + 953 = 49556
Step 53: 49556 + 953 = 50509
Step 54: 50509 + 953 = 51462
Step 55: 51462 + 953 = 52415
Step 56: 52415 + 953 = 53368
Step 57: 53368 + 953 = 54321
Step 58: 54321 + 953 = 55274
Step 59: 55274 + 953 = 56227
Step 60: 56227 + 953 = 57180
Step 61: 57180 + 953 = 58133
Step 62: 58133 + 953 = 59086
Step 63: 59086 + 953 = 60039
Step 64: 60039 + 953 = 60992
Step 65: 60992 + 953 = 61945
Step 66: 61945 + 953 = 62898
Step 67: 62898 + 953 = 63851
Step 68: 63851 + 953 = 64804
Step 69: 64804 + 953 = 65757
Step 70: 65757 + 953 = 66710
Step 71: 66710 + 953 = 67663
Step 72: 67663 + 953 = 68616
Step 73: 68616 + 953 = 69569
Step 74: 69569 + 953 = 70522
Step 75: 70522 + 953 = 71475
Step 76: 71475 + 953 = 72428
Step 77: 72428 + 953 = 73381
Step 78: 73381 + 953 = 74334
Step 79: 74334 + 953 = 75287
Step 80: 75287 + 953 = 76240
Step 81: 76240 + 953 = 77193
Step 82: 77193 + 953 = 78146
Step 83: 78146 + 953 = 79099
Step 84: 79099 + 953 = 80052
Step 85: 80052 + 953 = 81005
Step 86: 81005 + 953 = 81958
Step 87: 81958 + 953 = 82911
Step 88: 82911 + 953 = 83864
Step 89: 83864 + 953 = 84817
Step 90: 84817 + 953 = 85770
Step 91: 85770 + 953 = 86723
Step 92: 86723 + 953 = 87676
Step 93: 87676 + 953 = 88629
Step 94: 88629 + 953 = 89582
Step 95: 89582 + 953 = 90535
Step 96: 90535 + 953 = 91488
Step 97: 91488 + 953 = 92441
Step 98: 92441 + 953 = 93394
Step 99: 93394 + 953 = 94347
Step 100: 94347 + 953 = 95300
Step 101: 95300 + 953 = 96253
Step 102: 96253 + 953 = 97206
Step 103: 97206 + 953 = 98159
Step 104: 98159 + 953 = 99112
Step 105: 99112 + 953 = 100065
Step 106: 100065 + 953 = 101018
Step 107: 101018 + 953 = 101971
Step 108: 101971 + 953 = 102924
Step 109: 102924 + 953 = 103877
Step 110: 103877 + 953 = 104830
Step 111: 104830 + 953 = 105783
Step 112: 105783 + 953 = 106736
Step 113: 106736 + 953 = 107689
Step 114: 107689 + 953 = 108642
Step 115: 108642 + 953 = 109595
Step 116: 109595 + 953 = 110548
Step 117: 110548 + 953 = 111501
Step 118: 111501 + 953 = 112454
Step 119: 112454 + 953 = 113407
Step 120: 113407 + 953 = 114360
Step 121: 114360 + 953 = 115313
Step 122: 115313 + 953 = 116266
Step 123: 116266 + 953 = 117219
Step 124: 117219 + 953 = 118172
Step 125: 118172 + 953 = 119125
Step 126: 119125 + 953 = 120078
Step 127: 120078 + 953 = 121031
Step 128: 121031 + 953 = 121984
Step 129: 121984 + 953 = 122937
Step 130: 122937 + 953 = 123890
Step 131: 123890 + 953 = 124843
Step 132: 124843 + 953 = 125796
Step 133: 125796 + 953 = 126749
Step 134: 126749 + 953 = 127702
Step 135: 127702 + 953 = 128655
Step 136: 128655 + 953 = 129608
Step 137: 129608 + 953 = 130561
Step 138: 130561 + 953 = 131514
Step 139: 131514 + 953 = 132467
Step 140: 132467 + 953 = 133420
Step 141: 133420 + 953 = 134373
Step 142: 134373 + 953 = 135326
Step 143: 135326 + 953 = 136279
Step 144: 136279 + 953 = 137232
Step 145: 137232 + 953 = 138185
Step 146: 138185 + 953 = 139138
Step 147: 139138 + 953 = 140091
Step 148: 140091 + 953 = 141044
Step 149: 141044 + 953 = 141997
Step 150: 141997 + 953 = 142950
Step 151: 142950 + 953 = 143903
Step 152: 143903 + 953 = 144856
Step 153: 144856 + 953 = 145809
Step 154: 145809 + 953 = 146762
Step 155: 146762 + 953 = 147715
Step 156: 147715 + 953 = 148668
Step 157: 148668 + 953 = 149621
Step 158: 149621 + 953 = 150574
Step 159: 150574 + 953 = 151527
Step 160: 151527 + 953 = 152480
Step 161: 152480 + 953 = 153433
Step 162: 153433 + 953 = 154386
Step 163: 154386 + 953 = 155339
Step 164: 155339 + 953 = 156292
Step 165: 156292 + 953 = 157245
Step 166: 157245 + 953 = 158198
Step 167: 158198 + 953 = 159151
Step 168: 159151 + 953 = 160104
Step 169: 160104 + 953 = 161057
Step 170: 161057 + 953 = 162010
Step 171: 162010 + 953 = 162963
Step 172: 162963 + 953 = 163916
Step 173: 163916 + 953 = 164869
Step 174: 164869 + 953 = 165822
Step 175: 165822 + 953 = 166775
Step 176: 166775 + 953 = 167728
Step 177: 167728 + 953 = 168681
Step 178: 168681 + 953 = 169634
Step 179: 169634 + 953 = 170587
Step 180: 170587 + 953 = 171540
Step 181: 171540 + 953 = 172493
Step 182: 172493 + 953 = 173446
Step 183: 173446 + 953 = 174399
Step 184: 174399 + 953 = 175352
Step 185: 175352 + 953 = 176305
Step 186: 176305 + 953 = 177258
Step 187: 177258 + 953 = 178211
Step 188: 178211 + 953 = 179164
Step 189: 179164 + 953 = 180117
Step 190: 180117 + 953 = 181070
Step 191: 181070 + 953 = 182023
Step 192: 182023 + 953 = 182976
Step 193: 182976 + 953 = 183929
Step 194: 183929 + 953 = 184882
Step 195: 184882 + 953 = 185835
Step 196: 185835 + 953 = 186788
Step 197: 186788 + 953 = 187741
Step 198: 187741 + 953 = 188694
Step 199: 188694 + 953 = 189647
Step 200: 189647 + 953 = 190600
Step 201: 190600 + 953 = 191553
Step 202: 191553 + 953 = 192506
Step 203: 192506 + 953 = 193459
Step 204: 193459 + 953 = 194412
Step 205: 194412 + 953 = 195365
Step 206: 195365 + 953 = 196318
Step 207: 196318 + 953 = 197271
Step 208: 197271 + 953 = 198224
Step 209: 198224 + 953 = 199177
Step 210: 199177 + 953 = 200130
Step 211: 200130 + 953 = 201083
Step 212: 201083 + 953 = 202036
Step 213: 202036 + 953 = 202989
Step 214: 202989 + 953 = 203942
Step 215: 203942 + 953 = 204895
Step 216: 204895 + 953 = 205848
Step 217: 205848 + 953 = 206801
Step 218: 206801 + 953 = 207754
Step 219: 207754 + 953 = 208707
Step 220: 208707 + 953 = 209660
Step 221: 209660 + 953 = 210613
Step 222: 210613 + 953 = 211566
Step 223: 211566 + 953 = 212519
Step 224: 212519 + 953 = 213472
Step 225: 213472 + 953 = 214425
Step 226: 214425 + 953 = 215378
Step 227: 215378 + 953 = 216331
Step 228: 216331 + 953 = 217284
Step 229: 217284 + 953 = 218237
Step 230: 218237 + 953 = 219190
Step 231: 219190 + 953 = 220143
Step 232: 220143 + 953 = 221096
Step 233: 221096 + 953 = 222049
Step 234: 222049 + 953 = 223002
Step 235: 223002 + 953 = 223955
Step 236: 223955 + 953 = 224908
Step 237: 224908 + 953 = 225861
Step 238: 225861 + 953 = 226814
Step 239: 226814 + 953 = 227767
Step 240: 227767 + 953 = 228720
Step 241: 228720 + 953 = 229673
Step 242: 229673 + 953 = 230626
Step 243: 230626 + 953 = 231579
Step 244: 231579 + 953 = 232532
Step 245: 232532 + 953 = 233485
Step 246: 233485 + 953 = 234438
Step 247: 234438 + 953 = 235391
Step 248: 235391 + 953 = 236344
Step 249: 236344 + 953 = 237297
Step 250: 237297 + 953 = 238250
Step 251: 238250 + 953 = 239203
Step 252: 239203 + 953 = 240156
Step 253: 240156 + 953 = 241109
Step 254: 241109 + 953 = 242062
Step 255: 242062 + 953 = 243015
Step 256: 243015 + 953 = 243968
Step 257: 243968 + 953 = 244921
Step 258: 244921 + 953 = 245874
Step 259: 245874 + 953 = 246827
Step 260: 246827 + 953 = 247780
Step 261: 247780 + 953 = 248733
Step 262: 248733 + 953 = 249686
Step 263: 249686 + 953 = 250639
Step 264: 250639 + 953 = 251592
Step 265: 251592 + 953 = 252545
Step 266: 252545 + 953 = 253498
Step 267: 253498 + 953 = 254451
Step 268: 254451 + 953 = 255404
Step 269: 255404 + 953 = 256357
Step 270: 256357 + 953 = 257310
Step 271: 257310 + 953 = 258263
Step 272: 258263 + 953 = 259216
Step 273: 259216 + 953 = 260169
Step 274: 260169 + 953 = 261122
Step 275: 261122 + 953 = 262075
Step 276: 262075 + 953 = 263028
Step 277: 263028 + 953 = 263981
Step 278: 263981 + 953 = 264934
Step 279: 264934 + 953 = 265887
Step 280: 265887 + 953 = 266840
Step 281: 266840 + 953 = 267793
Step 282: 267793 + 953 = 268746
Step 283: 268746 + 953 = 269699
Step 284: 269699 + 953 = 270652
Step 285: 270652 + 953 = 271605
Step 286: 271605 + 953 = 272558
Step 287: 272558 + 953 = 273511
Step 288: 273511 + 953 = 274464
Step 289: 274464 + 953 = 275417
Step 290: 275417 + 953 = 276370
Step 291: 276370 + 953 = 277323
Step 292: 277323 + 953 = 278276
Step 293: 278276 + 953 = 279229
Step 294: 279229 + 953 = 280182
Step 295: 280182 + 953 = 281135
Step 296: 281135 + 953 = 282088
Step 297: 282088 + 953 = 283041
Step 298: 283041 + 953 = 283994
Step 299: 283994 + 953 = 284947
Step 300: 284947 + 953 = 285900
Step 301: 285900 + 953 = 286853
Step 302: 286853 + 953 = 287806
Step 303: 287806 + 953 = 288759
Step 304: 288759 + 953 = 289712
Step 305: 289712 + 953 = 290665
Step 306: 290665 + 953 = 291618
Step 307: 291618 + 953 = 292571
Step 308: 292571 + 953 = 293524
Step 309: 293524 + 953 = 294477
Step 310: 294477 + 953 = 295430
Step 311: 295430 + 953 = 296383
Step 312: 296383 + 953 = 297336
Step 313: 297336 + 953 = 298289
Step 314: 298289 + 953 = 299242
Step 315: 299242 + 953 = 300195
Step 316: 300195 + 953 = 301148
Step 317: 301148 + 953 = 302101
Step 318: 302101 + 953 = 303054
Step 319: 303054 + 953 = 304007
Step 320: 304007 + 953 = 304960
Step 321: 304960 + 953 = 305913
Step 322: 305913 + 953 = 306866
Step 323: 306866 + 953 = 307819
Step 324: 307819 + 953 = 308772
Step 325: 308772 + 953 = 309725
Step 326: 309725 + 953 = 310678
Step 327: 310678 + 953 = 311631
Step 328: 311631 + 953 = 312584
Step 329: 312584 + 953 = 313537
Step 330: 313537 + 953 = 314490
Step 331: 314490 + 953 = 315443
Step 332: 315443 + 953 = 316396
Step 333: 316396 + 953 = 317349
Step 334: 317349 + 953 = 318302
Step 335: 318302 + 953 = 319255
Step 336: 319255 + 953 = 320208
Step 337: 320208 + 953 = 321161
Step 338: 321161 + 953 = 322114
Step 339: 322114 + 953 = 323067
Step 340: 323067 + 953 = 324020
Step 341: 324020 + 953 = 324973
Step 342: 324973 + 953 = 325926
Step 343: 325926 + 953 = 326879
Step 344: 326879 + 953 = 327832
Step 345: 327832 + 953 = 328785
Step 346: 328785 + 953 = 329738
Step 347: 329738 + 953 = 330691
Step 348: 330691 + 953 = 331644
Step 349: 331644 + 953 = 332597
Step 350: 332597 + 953 = 333550
Step 351: 333550 + 953 = 334503
Step 352: 334503 + 953 = 335456
Step 353: 335456 + 953 = 336409
Step 354: 336409 + 953 = 337362
Step 355: 337362 + 953 = 338315
Step 356: 338315 + 953 = 339268
Step 357: 339268 + 953 = 340221
Step 358: 340221 + 953 = 341174
Step 359: 341174 + 953 = 342127
Step 360: 342127 + 953 = 343080
Step 361: 343080 + 953 = 344033
Step 362: 344033 + 953 = 344986
Step 363: 344986 + 953 = 345939
Step 364: 345939 + 953 = 346892
Step 365: 346892 + 953 = 347845
Step 366: 347845 + 953 = 348798
Step 367: 348798 + 953 = 349751
Step 368: 349751 + 953 = 350704
Step 369: 350704 + 953 = 351657
Step 370: 351657 + 953 = 352610
Step 371: 352610 + 953 = 353563
Step 372: 353563 + 953 = 354516
Step 373: 354516 + 953 = 355469
Step 374: 355469 + 953 = 356422
Step 375: 356422 + 953 = 357375
Step 376: 357375 + 953 = 358328
Step 377: 358328 + 953 = 359281
Step 378: 359281 + 953 = 360234
Step 379: 360234 + 953 = 361187
Step 380: 361187 + 953 = 362140
Step 381: 362140 + 953 = 363093
Step 382: 363093 + 953 = 364046
Step 383: 364046 + 953 = 364999
Step 384: 364999 + 953 = 365952
Step 385: 365952 + 953 = 366905
Step 386: 366905 + 953 = 367858
Step 387: 367858 + 953 = 368811
Step 388: 368811 + 953 = 369764
Step 389: 369764 + 953 = 370717
Step 390: 370717 + 953 = 371670
Step 391: 371670 + 953 = 372623
Step 392: 372623 + 953 = 373576
Step 393: 373576 + 953 = 374529
Step 394: 374529 + 953 = 375482
Step 395: 375482 + 953 = 376435
Step 396: 376435 + 953 = 377388
Step 397: 377388 + 953 = 378341
Step 398: 378341 + 953 = 379294
Step 399: 379294 + 953 = 380247
Step 400: 380247 + 953 = 381200
Step 401: 381200 + 953 = 382153
Step 402: 382153 + 953 = 383106
Step 403: 383106 + 953 = 384059
Step 404: 384059 + 953 = 385012
Step 405: 385012 + 953 = 385965
Step 406: 385965 + 953 = 386918
Step 407: 386918 + 953 = 387871
Step 408: 387871 + 953 = 388824
Step 409: 388824 + 953 = 389777
Step 410: 389777 + 953 = 390730
Step 411: 390730 + 953 = 391683
Step 412: 391683 + 953 = 392636
Step 413: 392636 + 953 = 393589
Step 414: 393589 + 953 = 394542
Step 415: 394542 + 953 = 395495
Step 416: 395495 + 953 = 396448
Step 417: 396448 + 953 = 397401
Step 418: 397401 + 953 = 398354
Step 419: 398354 + 953 = 399307
Step 420: 399307 + 953 = 400260
Step 421: 400260 + 953 = 401213

So, 953*421 = 401213