Without delay, let's solve this. We've got 743 and we will be multiplying it by 86, that is, adding 743 to itself 86 times.
Step 1: 0 + 743 = 743
Step 2: 743 + 743 = 1486
Step 3: 1486 + 743 = 2229
Step 4: 2229 + 743 = 2972
Step 5: 2972 + 743 = 3715
Step 6: 3715 + 743 = 4458
Step 7: 4458 + 743 = 5201
Step 8: 5201 + 743 = 5944
Step 9: 5944 + 743 = 6687
Step 10: 6687 + 743 = 7430
Step 11: 7430 + 743 = 8173
Step 12: 8173 + 743 = 8916
Step 13: 8916 + 743 = 9659
Step 14: 9659 + 743 = 10402
Step 15: 10402 + 743 = 11145
Step 16: 11145 + 743 = 11888
Step 17: 11888 + 743 = 12631
Step 18: 12631 + 743 = 13374
Step 19: 13374 + 743 = 14117
Step 20: 14117 + 743 = 14860
Step 21: 14860 + 743 = 15603
Step 22: 15603 + 743 = 16346
Step 23: 16346 + 743 = 17089
Step 24: 17089 + 743 = 17832
Step 25: 17832 + 743 = 18575
Step 26: 18575 + 743 = 19318
Step 27: 19318 + 743 = 20061
Step 28: 20061 + 743 = 20804
Step 29: 20804 + 743 = 21547
Step 30: 21547 + 743 = 22290
Step 31: 22290 + 743 = 23033
Step 32: 23033 + 743 = 23776
Step 33: 23776 + 743 = 24519
Step 34: 24519 + 743 = 25262
Step 35: 25262 + 743 = 26005
Step 36: 26005 + 743 = 26748
Step 37: 26748 + 743 = 27491
Step 38: 27491 + 743 = 28234
Step 39: 28234 + 743 = 28977
Step 40: 28977 + 743 = 29720
Step 41: 29720 + 743 = 30463
Step 42: 30463 + 743 = 31206
Step 43: 31206 + 743 = 31949
Step 44: 31949 + 743 = 32692
Step 45: 32692 + 743 = 33435
Step 46: 33435 + 743 = 34178
Step 47: 34178 + 743 = 34921
Step 48: 34921 + 743 = 35664
Step 49: 35664 + 743 = 36407
Step 50: 36407 + 743 = 37150
Step 51: 37150 + 743 = 37893
Step 52: 37893 + 743 = 38636
Step 53: 38636 + 743 = 39379
Step 54: 39379 + 743 = 40122
Step 55: 40122 + 743 = 40865
Step 56: 40865 + 743 = 41608
Step 57: 41608 + 743 = 42351
Step 58: 42351 + 743 = 43094
Step 59: 43094 + 743 = 43837
Step 60: 43837 + 743 = 44580
Step 61: 44580 + 743 = 45323
Step 62: 45323 + 743 = 46066
Step 63: 46066 + 743 = 46809
Step 64: 46809 + 743 = 47552
Step 65: 47552 + 743 = 48295
Step 66: 48295 + 743 = 49038
Step 67: 49038 + 743 = 49781
Step 68: 49781 + 743 = 50524
Step 69: 50524 + 743 = 51267
Step 70: 51267 + 743 = 52010
Step 71: 52010 + 743 = 52753
Step 72: 52753 + 743 = 53496
Step 73: 53496 + 743 = 54239
Step 74: 54239 + 743 = 54982
Step 75: 54982 + 743 = 55725
Step 76: 55725 + 743 = 56468
Step 77: 56468 + 743 = 57211
Step 78: 57211 + 743 = 57954
Step 79: 57954 + 743 = 58697
Step 80: 58697 + 743 = 59440
Step 81: 59440 + 743 = 60183
Step 82: 60183 + 743 = 60926
Step 83: 60926 + 743 = 61669
Step 84: 61669 + 743 = 62412
Step 85: 62412 + 743 = 63155
Step 86: 63155 + 743 = 63898

So, 743*86 = 63898