Without delay, let's solve this. We've got 957 and we will be multiplying it by 405, that is, adding 957 to itself 405 times.
Step 1: 0 + 957 = 957
Step 2: 957 + 957 = 1914
Step 3: 1914 + 957 = 2871
Step 4: 2871 + 957 = 3828
Step 5: 3828 + 957 = 4785
Step 6: 4785 + 957 = 5742
Step 7: 5742 + 957 = 6699
Step 8: 6699 + 957 = 7656
Step 9: 7656 + 957 = 8613
Step 10: 8613 + 957 = 9570
Step 11: 9570 + 957 = 10527
Step 12: 10527 + 957 = 11484
Step 13: 11484 + 957 = 12441
Step 14: 12441 + 957 = 13398
Step 15: 13398 + 957 = 14355
Step 16: 14355 + 957 = 15312
Step 17: 15312 + 957 = 16269
Step 18: 16269 + 957 = 17226
Step 19: 17226 + 957 = 18183
Step 20: 18183 + 957 = 19140
Step 21: 19140 + 957 = 20097
Step 22: 20097 + 957 = 21054
Step 23: 21054 + 957 = 22011
Step 24: 22011 + 957 = 22968
Step 25: 22968 + 957 = 23925
Step 26: 23925 + 957 = 24882
Step 27: 24882 + 957 = 25839
Step 28: 25839 + 957 = 26796
Step 29: 26796 + 957 = 27753
Step 30: 27753 + 957 = 28710
Step 31: 28710 + 957 = 29667
Step 32: 29667 + 957 = 30624
Step 33: 30624 + 957 = 31581
Step 34: 31581 + 957 = 32538
Step 35: 32538 + 957 = 33495
Step 36: 33495 + 957 = 34452
Step 37: 34452 + 957 = 35409
Step 38: 35409 + 957 = 36366
Step 39: 36366 + 957 = 37323
Step 40: 37323 + 957 = 38280
Step 41: 38280 + 957 = 39237
Step 42: 39237 + 957 = 40194
Step 43: 40194 + 957 = 41151
Step 44: 41151 + 957 = 42108
Step 45: 42108 + 957 = 43065
Step 46: 43065 + 957 = 44022
Step 47: 44022 + 957 = 44979
Step 48: 44979 + 957 = 45936
Step 49: 45936 + 957 = 46893
Step 50: 46893 + 957 = 47850
Step 51: 47850 + 957 = 48807
Step 52: 48807 + 957 = 49764
Step 53: 49764 + 957 = 50721
Step 54: 50721 + 957 = 51678
Step 55: 51678 + 957 = 52635
Step 56: 52635 + 957 = 53592
Step 57: 53592 + 957 = 54549
Step 58: 54549 + 957 = 55506
Step 59: 55506 + 957 = 56463
Step 60: 56463 + 957 = 57420
Step 61: 57420 + 957 = 58377
Step 62: 58377 + 957 = 59334
Step 63: 59334 + 957 = 60291
Step 64: 60291 + 957 = 61248
Step 65: 61248 + 957 = 62205
Step 66: 62205 + 957 = 63162
Step 67: 63162 + 957 = 64119
Step 68: 64119 + 957 = 65076
Step 69: 65076 + 957 = 66033
Step 70: 66033 + 957 = 66990
Step 71: 66990 + 957 = 67947
Step 72: 67947 + 957 = 68904
Step 73: 68904 + 957 = 69861
Step 74: 69861 + 957 = 70818
Step 75: 70818 + 957 = 71775
Step 76: 71775 + 957 = 72732
Step 77: 72732 + 957 = 73689
Step 78: 73689 + 957 = 74646
Step 79: 74646 + 957 = 75603
Step 80: 75603 + 957 = 76560
Step 81: 76560 + 957 = 77517
Step 82: 77517 + 957 = 78474
Step 83: 78474 + 957 = 79431
Step 84: 79431 + 957 = 80388
Step 85: 80388 + 957 = 81345
Step 86: 81345 + 957 = 82302
Step 87: 82302 + 957 = 83259
Step 88: 83259 + 957 = 84216
Step 89: 84216 + 957 = 85173
Step 90: 85173 + 957 = 86130
Step 91: 86130 + 957 = 87087
Step 92: 87087 + 957 = 88044
Step 93: 88044 + 957 = 89001
Step 94: 89001 + 957 = 89958
Step 95: 89958 + 957 = 90915
Step 96: 90915 + 957 = 91872
Step 97: 91872 + 957 = 92829
Step 98: 92829 + 957 = 93786
Step 99: 93786 + 957 = 94743
Step 100: 94743 + 957 = 95700
Step 101: 95700 + 957 = 96657
Step 102: 96657 + 957 = 97614
Step 103: 97614 + 957 = 98571
Step 104: 98571 + 957 = 99528
Step 105: 99528 + 957 = 100485
Step 106: 100485 + 957 = 101442
Step 107: 101442 + 957 = 102399
Step 108: 102399 + 957 = 103356
Step 109: 103356 + 957 = 104313
Step 110: 104313 + 957 = 105270
Step 111: 105270 + 957 = 106227
Step 112: 106227 + 957 = 107184
Step 113: 107184 + 957 = 108141
Step 114: 108141 + 957 = 109098
Step 115: 109098 + 957 = 110055
Step 116: 110055 + 957 = 111012
Step 117: 111012 + 957 = 111969
Step 118: 111969 + 957 = 112926
Step 119: 112926 + 957 = 113883
Step 120: 113883 + 957 = 114840
Step 121: 114840 + 957 = 115797
Step 122: 115797 + 957 = 116754
Step 123: 116754 + 957 = 117711
Step 124: 117711 + 957 = 118668
Step 125: 118668 + 957 = 119625
Step 126: 119625 + 957 = 120582
Step 127: 120582 + 957 = 121539
Step 128: 121539 + 957 = 122496
Step 129: 122496 + 957 = 123453
Step 130: 123453 + 957 = 124410
Step 131: 124410 + 957 = 125367
Step 132: 125367 + 957 = 126324
Step 133: 126324 + 957 = 127281
Step 134: 127281 + 957 = 128238
Step 135: 128238 + 957 = 129195
Step 136: 129195 + 957 = 130152
Step 137: 130152 + 957 = 131109
Step 138: 131109 + 957 = 132066
Step 139: 132066 + 957 = 133023
Step 140: 133023 + 957 = 133980
Step 141: 133980 + 957 = 134937
Step 142: 134937 + 957 = 135894
Step 143: 135894 + 957 = 136851
Step 144: 136851 + 957 = 137808
Step 145: 137808 + 957 = 138765
Step 146: 138765 + 957 = 139722
Step 147: 139722 + 957 = 140679
Step 148: 140679 + 957 = 141636
Step 149: 141636 + 957 = 142593
Step 150: 142593 + 957 = 143550
Step 151: 143550 + 957 = 144507
Step 152: 144507 + 957 = 145464
Step 153: 145464 + 957 = 146421
Step 154: 146421 + 957 = 147378
Step 155: 147378 + 957 = 148335
Step 156: 148335 + 957 = 149292
Step 157: 149292 + 957 = 150249
Step 158: 150249 + 957 = 151206
Step 159: 151206 + 957 = 152163
Step 160: 152163 + 957 = 153120
Step 161: 153120 + 957 = 154077
Step 162: 154077 + 957 = 155034
Step 163: 155034 + 957 = 155991
Step 164: 155991 + 957 = 156948
Step 165: 156948 + 957 = 157905
Step 166: 157905 + 957 = 158862
Step 167: 158862 + 957 = 159819
Step 168: 159819 + 957 = 160776
Step 169: 160776 + 957 = 161733
Step 170: 161733 + 957 = 162690
Step 171: 162690 + 957 = 163647
Step 172: 163647 + 957 = 164604
Step 173: 164604 + 957 = 165561
Step 174: 165561 + 957 = 166518
Step 175: 166518 + 957 = 167475
Step 176: 167475 + 957 = 168432
Step 177: 168432 + 957 = 169389
Step 178: 169389 + 957 = 170346
Step 179: 170346 + 957 = 171303
Step 180: 171303 + 957 = 172260
Step 181: 172260 + 957 = 173217
Step 182: 173217 + 957 = 174174
Step 183: 174174 + 957 = 175131
Step 184: 175131 + 957 = 176088
Step 185: 176088 + 957 = 177045
Step 186: 177045 + 957 = 178002
Step 187: 178002 + 957 = 178959
Step 188: 178959 + 957 = 179916
Step 189: 179916 + 957 = 180873
Step 190: 180873 + 957 = 181830
Step 191: 181830 + 957 = 182787
Step 192: 182787 + 957 = 183744
Step 193: 183744 + 957 = 184701
Step 194: 184701 + 957 = 185658
Step 195: 185658 + 957 = 186615
Step 196: 186615 + 957 = 187572
Step 197: 187572 + 957 = 188529
Step 198: 188529 + 957 = 189486
Step 199: 189486 + 957 = 190443
Step 200: 190443 + 957 = 191400
Step 201: 191400 + 957 = 192357
Step 202: 192357 + 957 = 193314
Step 203: 193314 + 957 = 194271
Step 204: 194271 + 957 = 195228
Step 205: 195228 + 957 = 196185
Step 206: 196185 + 957 = 197142
Step 207: 197142 + 957 = 198099
Step 208: 198099 + 957 = 199056
Step 209: 199056 + 957 = 200013
Step 210: 200013 + 957 = 200970
Step 211: 200970 + 957 = 201927
Step 212: 201927 + 957 = 202884
Step 213: 202884 + 957 = 203841
Step 214: 203841 + 957 = 204798
Step 215: 204798 + 957 = 205755
Step 216: 205755 + 957 = 206712
Step 217: 206712 + 957 = 207669
Step 218: 207669 + 957 = 208626
Step 219: 208626 + 957 = 209583
Step 220: 209583 + 957 = 210540
Step 221: 210540 + 957 = 211497
Step 222: 211497 + 957 = 212454
Step 223: 212454 + 957 = 213411
Step 224: 213411 + 957 = 214368
Step 225: 214368 + 957 = 215325
Step 226: 215325 + 957 = 216282
Step 227: 216282 + 957 = 217239
Step 228: 217239 + 957 = 218196
Step 229: 218196 + 957 = 219153
Step 230: 219153 + 957 = 220110
Step 231: 220110 + 957 = 221067
Step 232: 221067 + 957 = 222024
Step 233: 222024 + 957 = 222981
Step 234: 222981 + 957 = 223938
Step 235: 223938 + 957 = 224895
Step 236: 224895 + 957 = 225852
Step 237: 225852 + 957 = 226809
Step 238: 226809 + 957 = 227766
Step 239: 227766 + 957 = 228723
Step 240: 228723 + 957 = 229680
Step 241: 229680 + 957 = 230637
Step 242: 230637 + 957 = 231594
Step 243: 231594 + 957 = 232551
Step 244: 232551 + 957 = 233508
Step 245: 233508 + 957 = 234465
Step 246: 234465 + 957 = 235422
Step 247: 235422 + 957 = 236379
Step 248: 236379 + 957 = 237336
Step 249: 237336 + 957 = 238293
Step 250: 238293 + 957 = 239250
Step 251: 239250 + 957 = 240207
Step 252: 240207 + 957 = 241164
Step 253: 241164 + 957 = 242121
Step 254: 242121 + 957 = 243078
Step 255: 243078 + 957 = 244035
Step 256: 244035 + 957 = 244992
Step 257: 244992 + 957 = 245949
Step 258: 245949 + 957 = 246906
Step 259: 246906 + 957 = 247863
Step 260: 247863 + 957 = 248820
Step 261: 248820 + 957 = 249777
Step 262: 249777 + 957 = 250734
Step 263: 250734 + 957 = 251691
Step 264: 251691 + 957 = 252648
Step 265: 252648 + 957 = 253605
Step 266: 253605 + 957 = 254562
Step 267: 254562 + 957 = 255519
Step 268: 255519 + 957 = 256476
Step 269: 256476 + 957 = 257433
Step 270: 257433 + 957 = 258390
Step 271: 258390 + 957 = 259347
Step 272: 259347 + 957 = 260304
Step 273: 260304 + 957 = 261261
Step 274: 261261 + 957 = 262218
Step 275: 262218 + 957 = 263175
Step 276: 263175 + 957 = 264132
Step 277: 264132 + 957 = 265089
Step 278: 265089 + 957 = 266046
Step 279: 266046 + 957 = 267003
Step 280: 267003 + 957 = 267960
Step 281: 267960 + 957 = 268917
Step 282: 268917 + 957 = 269874
Step 283: 269874 + 957 = 270831
Step 284: 270831 + 957 = 271788
Step 285: 271788 + 957 = 272745
Step 286: 272745 + 957 = 273702
Step 287: 273702 + 957 = 274659
Step 288: 274659 + 957 = 275616
Step 289: 275616 + 957 = 276573
Step 290: 276573 + 957 = 277530
Step 291: 277530 + 957 = 278487
Step 292: 278487 + 957 = 279444
Step 293: 279444 + 957 = 280401
Step 294: 280401 + 957 = 281358
Step 295: 281358 + 957 = 282315
Step 296: 282315 + 957 = 283272
Step 297: 283272 + 957 = 284229
Step 298: 284229 + 957 = 285186
Step 299: 285186 + 957 = 286143
Step 300: 286143 + 957 = 287100
Step 301: 287100 + 957 = 288057
Step 302: 288057 + 957 = 289014
Step 303: 289014 + 957 = 289971
Step 304: 289971 + 957 = 290928
Step 305: 290928 + 957 = 291885
Step 306: 291885 + 957 = 292842
Step 307: 292842 + 957 = 293799
Step 308: 293799 + 957 = 294756
Step 309: 294756 + 957 = 295713
Step 310: 295713 + 957 = 296670
Step 311: 296670 + 957 = 297627
Step 312: 297627 + 957 = 298584
Step 313: 298584 + 957 = 299541
Step 314: 299541 + 957 = 300498
Step 315: 300498 + 957 = 301455
Step 316: 301455 + 957 = 302412
Step 317: 302412 + 957 = 303369
Step 318: 303369 + 957 = 304326
Step 319: 304326 + 957 = 305283
Step 320: 305283 + 957 = 306240
Step 321: 306240 + 957 = 307197
Step 322: 307197 + 957 = 308154
Step 323: 308154 + 957 = 309111
Step 324: 309111 + 957 = 310068
Step 325: 310068 + 957 = 311025
Step 326: 311025 + 957 = 311982
Step 327: 311982 + 957 = 312939
Step 328: 312939 + 957 = 313896
Step 329: 313896 + 957 = 314853
Step 330: 314853 + 957 = 315810
Step 331: 315810 + 957 = 316767
Step 332: 316767 + 957 = 317724
Step 333: 317724 + 957 = 318681
Step 334: 318681 + 957 = 319638
Step 335: 319638 + 957 = 320595
Step 336: 320595 + 957 = 321552
Step 337: 321552 + 957 = 322509
Step 338: 322509 + 957 = 323466
Step 339: 323466 + 957 = 324423
Step 340: 324423 + 957 = 325380
Step 341: 325380 + 957 = 326337
Step 342: 326337 + 957 = 327294
Step 343: 327294 + 957 = 328251
Step 344: 328251 + 957 = 329208
Step 345: 329208 + 957 = 330165
Step 346: 330165 + 957 = 331122
Step 347: 331122 + 957 = 332079
Step 348: 332079 + 957 = 333036
Step 349: 333036 + 957 = 333993
Step 350: 333993 + 957 = 334950
Step 351: 334950 + 957 = 335907
Step 352: 335907 + 957 = 336864
Step 353: 336864 + 957 = 337821
Step 354: 337821 + 957 = 338778
Step 355: 338778 + 957 = 339735
Step 356: 339735 + 957 = 340692
Step 357: 340692 + 957 = 341649
Step 358: 341649 + 957 = 342606
Step 359: 342606 + 957 = 343563
Step 360: 343563 + 957 = 344520
Step 361: 344520 + 957 = 345477
Step 362: 345477 + 957 = 346434
Step 363: 346434 + 957 = 347391
Step 364: 347391 + 957 = 348348
Step 365: 348348 + 957 = 349305
Step 366: 349305 + 957 = 350262
Step 367: 350262 + 957 = 351219
Step 368: 351219 + 957 = 352176
Step 369: 352176 + 957 = 353133
Step 370: 353133 + 957 = 354090
Step 371: 354090 + 957 = 355047
Step 372: 355047 + 957 = 356004
Step 373: 356004 + 957 = 356961
Step 374: 356961 + 957 = 357918
Step 375: 357918 + 957 = 358875
Step 376: 358875 + 957 = 359832
Step 377: 359832 + 957 = 360789
Step 378: 360789 + 957 = 361746
Step 379: 361746 + 957 = 362703
Step 380: 362703 + 957 = 363660
Step 381: 363660 + 957 = 364617
Step 382: 364617 + 957 = 365574
Step 383: 365574 + 957 = 366531
Step 384: 366531 + 957 = 367488
Step 385: 367488 + 957 = 368445
Step 386: 368445 + 957 = 369402
Step 387: 369402 + 957 = 370359
Step 388: 370359 + 957 = 371316
Step 389: 371316 + 957 = 372273
Step 390: 372273 + 957 = 373230
Step 391: 373230 + 957 = 374187
Step 392: 374187 + 957 = 375144
Step 393: 375144 + 957 = 376101
Step 394: 376101 + 957 = 377058
Step 395: 377058 + 957 = 378015
Step 396: 378015 + 957 = 378972
Step 397: 378972 + 957 = 379929
Step 398: 379929 + 957 = 380886
Step 399: 380886 + 957 = 381843
Step 400: 381843 + 957 = 382800
Step 401: 382800 + 957 = 383757
Step 402: 383757 + 957 = 384714
Step 403: 384714 + 957 = 385671
Step 404: 385671 + 957 = 386628
Step 405: 386628 + 957 = 387585

So, 957*405 = 387585