Let's roll up our sleeves and solve this. We have 397 and we're going to multiply it by 105, essentially adding 397 to itself 105 times.
Step 1: 0 + 397 = 397
Step 2: 397 + 397 = 794
Step 3: 794 + 397 = 1191
Step 4: 1191 + 397 = 1588
Step 5: 1588 + 397 = 1985
Step 6: 1985 + 397 = 2382
Step 7: 2382 + 397 = 2779
Step 8: 2779 + 397 = 3176
Step 9: 3176 + 397 = 3573
Step 10: 3573 + 397 = 3970
Step 11: 3970 + 397 = 4367
Step 12: 4367 + 397 = 4764
Step 13: 4764 + 397 = 5161
Step 14: 5161 + 397 = 5558
Step 15: 5558 + 397 = 5955
Step 16: 5955 + 397 = 6352
Step 17: 6352 + 397 = 6749
Step 18: 6749 + 397 = 7146
Step 19: 7146 + 397 = 7543
Step 20: 7543 + 397 = 7940
Step 21: 7940 + 397 = 8337
Step 22: 8337 + 397 = 8734
Step 23: 8734 + 397 = 9131
Step 24: 9131 + 397 = 9528
Step 25: 9528 + 397 = 9925
Step 26: 9925 + 397 = 10322
Step 27: 10322 + 397 = 10719
Step 28: 10719 + 397 = 11116
Step 29: 11116 + 397 = 11513
Step 30: 11513 + 397 = 11910
Step 31: 11910 + 397 = 12307
Step 32: 12307 + 397 = 12704
Step 33: 12704 + 397 = 13101
Step 34: 13101 + 397 = 13498
Step 35: 13498 + 397 = 13895
Step 36: 13895 + 397 = 14292
Step 37: 14292 + 397 = 14689
Step 38: 14689 + 397 = 15086
Step 39: 15086 + 397 = 15483
Step 40: 15483 + 397 = 15880
Step 41: 15880 + 397 = 16277
Step 42: 16277 + 397 = 16674
Step 43: 16674 + 397 = 17071
Step 44: 17071 + 397 = 17468
Step 45: 17468 + 397 = 17865
Step 46: 17865 + 397 = 18262
Step 47: 18262 + 397 = 18659
Step 48: 18659 + 397 = 19056
Step 49: 19056 + 397 = 19453
Step 50: 19453 + 397 = 19850
Step 51: 19850 + 397 = 20247
Step 52: 20247 + 397 = 20644
Step 53: 20644 + 397 = 21041
Step 54: 21041 + 397 = 21438
Step 55: 21438 + 397 = 21835
Step 56: 21835 + 397 = 22232
Step 57: 22232 + 397 = 22629
Step 58: 22629 + 397 = 23026
Step 59: 23026 + 397 = 23423
Step 60: 23423 + 397 = 23820
Step 61: 23820 + 397 = 24217
Step 62: 24217 + 397 = 24614
Step 63: 24614 + 397 = 25011
Step 64: 25011 + 397 = 25408
Step 65: 25408 + 397 = 25805
Step 66: 25805 + 397 = 26202
Step 67: 26202 + 397 = 26599
Step 68: 26599 + 397 = 26996
Step 69: 26996 + 397 = 27393
Step 70: 27393 + 397 = 27790
Step 71: 27790 + 397 = 28187
Step 72: 28187 + 397 = 28584
Step 73: 28584 + 397 = 28981
Step 74: 28981 + 397 = 29378
Step 75: 29378 + 397 = 29775
Step 76: 29775 + 397 = 30172
Step 77: 30172 + 397 = 30569
Step 78: 30569 + 397 = 30966
Step 79: 30966 + 397 = 31363
Step 80: 31363 + 397 = 31760
Step 81: 31760 + 397 = 32157
Step 82: 32157 + 397 = 32554
Step 83: 32554 + 397 = 32951
Step 84: 32951 + 397 = 33348
Step 85: 33348 + 397 = 33745
Step 86: 33745 + 397 = 34142
Step 87: 34142 + 397 = 34539
Step 88: 34539 + 397 = 34936
Step 89: 34936 + 397 = 35333
Step 90: 35333 + 397 = 35730
Step 91: 35730 + 397 = 36127
Step 92: 36127 + 397 = 36524
Step 93: 36524 + 397 = 36921
Step 94: 36921 + 397 = 37318
Step 95: 37318 + 397 = 37715
Step 96: 37715 + 397 = 38112
Step 97: 38112 + 397 = 38509
Step 98: 38509 + 397 = 38906
Step 99: 38906 + 397 = 39303
Step 100: 39303 + 397 = 39700
Step 101: 39700 + 397 = 40097
Step 102: 40097 + 397 = 40494
Step 103: 40494 + 397 = 40891
Step 104: 40891 + 397 = 41288
Step 105: 41288 + 397 = 41685

So, 397*105 = 41685