Sure thing! We've got 407 and we're gonna multiply it by 102. That's the same as adding 407 to itself 102 times.
Step 1: 0 + 407 = 407
Step 2: 407 + 407 = 814
Step 3: 814 + 407 = 1221
Step 4: 1221 + 407 = 1628
Step 5: 1628 + 407 = 2035
Step 6: 2035 + 407 = 2442
Step 7: 2442 + 407 = 2849
Step 8: 2849 + 407 = 3256
Step 9: 3256 + 407 = 3663
Step 10: 3663 + 407 = 4070
Step 11: 4070 + 407 = 4477
Step 12: 4477 + 407 = 4884
Step 13: 4884 + 407 = 5291
Step 14: 5291 + 407 = 5698
Step 15: 5698 + 407 = 6105
Step 16: 6105 + 407 = 6512
Step 17: 6512 + 407 = 6919
Step 18: 6919 + 407 = 7326
Step 19: 7326 + 407 = 7733
Step 20: 7733 + 407 = 8140
Step 21: 8140 + 407 = 8547
Step 22: 8547 + 407 = 8954
Step 23: 8954 + 407 = 9361
Step 24: 9361 + 407 = 9768
Step 25: 9768 + 407 = 10175
Step 26: 10175 + 407 = 10582
Step 27: 10582 + 407 = 10989
Step 28: 10989 + 407 = 11396
Step 29: 11396 + 407 = 11803
Step 30: 11803 + 407 = 12210
Step 31: 12210 + 407 = 12617
Step 32: 12617 + 407 = 13024
Step 33: 13024 + 407 = 13431
Step 34: 13431 + 407 = 13838
Step 35: 13838 + 407 = 14245
Step 36: 14245 + 407 = 14652
Step 37: 14652 + 407 = 15059
Step 38: 15059 + 407 = 15466
Step 39: 15466 + 407 = 15873
Step 40: 15873 + 407 = 16280
Step 41: 16280 + 407 = 16687
Step 42: 16687 + 407 = 17094
Step 43: 17094 + 407 = 17501
Step 44: 17501 + 407 = 17908
Step 45: 17908 + 407 = 18315
Step 46: 18315 + 407 = 18722
Step 47: 18722 + 407 = 19129
Step 48: 19129 + 407 = 19536
Step 49: 19536 + 407 = 19943
Step 50: 19943 + 407 = 20350
Step 51: 20350 + 407 = 20757
Step 52: 20757 + 407 = 21164
Step 53: 21164 + 407 = 21571
Step 54: 21571 + 407 = 21978
Step 55: 21978 + 407 = 22385
Step 56: 22385 + 407 = 22792
Step 57: 22792 + 407 = 23199
Step 58: 23199 + 407 = 23606
Step 59: 23606 + 407 = 24013
Step 60: 24013 + 407 = 24420
Step 61: 24420 + 407 = 24827
Step 62: 24827 + 407 = 25234
Step 63: 25234 + 407 = 25641
Step 64: 25641 + 407 = 26048
Step 65: 26048 + 407 = 26455
Step 66: 26455 + 407 = 26862
Step 67: 26862 + 407 = 27269
Step 68: 27269 + 407 = 27676
Step 69: 27676 + 407 = 28083
Step 70: 28083 + 407 = 28490
Step 71: 28490 + 407 = 28897
Step 72: 28897 + 407 = 29304
Step 73: 29304 + 407 = 29711
Step 74: 29711 + 407 = 30118
Step 75: 30118 + 407 = 30525
Step 76: 30525 + 407 = 30932
Step 77: 30932 + 407 = 31339
Step 78: 31339 + 407 = 31746
Step 79: 31746 + 407 = 32153
Step 80: 32153 + 407 = 32560
Step 81: 32560 + 407 = 32967
Step 82: 32967 + 407 = 33374
Step 83: 33374 + 407 = 33781
Step 84: 33781 + 407 = 34188
Step 85: 34188 + 407 = 34595
Step 86: 34595 + 407 = 35002
Step 87: 35002 + 407 = 35409
Step 88: 35409 + 407 = 35816
Step 89: 35816 + 407 = 36223
Step 90: 36223 + 407 = 36630
Step 91: 36630 + 407 = 37037
Step 92: 37037 + 407 = 37444
Step 93: 37444 + 407 = 37851
Step 94: 37851 + 407 = 38258
Step 95: 38258 + 407 = 38665
Step 96: 38665 + 407 = 39072
Step 97: 39072 + 407 = 39479
Step 98: 39479 + 407 = 39886
Step 99: 39886 + 407 = 40293
Step 100: 40293 + 407 = 40700
Step 101: 40700 + 407 = 41107
Step 102: 41107 + 407 = 41514

So, 407*102 = 41514