OK, let's work through this together. We're starting with 691 and we're going to multiply it by 87, which means we add 691 to itself 87 times.
Step 1: 0 + 691 = 691
Step 2: 691 + 691 = 1382
Step 3: 1382 + 691 = 2073
Step 4: 2073 + 691 = 2764
Step 5: 2764 + 691 = 3455
Step 6: 3455 + 691 = 4146
Step 7: 4146 + 691 = 4837
Step 8: 4837 + 691 = 5528
Step 9: 5528 + 691 = 6219
Step 10: 6219 + 691 = 6910
Step 11: 6910 + 691 = 7601
Step 12: 7601 + 691 = 8292
Step 13: 8292 + 691 = 8983
Step 14: 8983 + 691 = 9674
Step 15: 9674 + 691 = 10365
Step 16: 10365 + 691 = 11056
Step 17: 11056 + 691 = 11747
Step 18: 11747 + 691 = 12438
Step 19: 12438 + 691 = 13129
Step 20: 13129 + 691 = 13820
Step 21: 13820 + 691 = 14511
Step 22: 14511 + 691 = 15202
Step 23: 15202 + 691 = 15893
Step 24: 15893 + 691 = 16584
Step 25: 16584 + 691 = 17275
Step 26: 17275 + 691 = 17966
Step 27: 17966 + 691 = 18657
Step 28: 18657 + 691 = 19348
Step 29: 19348 + 691 = 20039
Step 30: 20039 + 691 = 20730
Step 31: 20730 + 691 = 21421
Step 32: 21421 + 691 = 22112
Step 33: 22112 + 691 = 22803
Step 34: 22803 + 691 = 23494
Step 35: 23494 + 691 = 24185
Step 36: 24185 + 691 = 24876
Step 37: 24876 + 691 = 25567
Step 38: 25567 + 691 = 26258
Step 39: 26258 + 691 = 26949
Step 40: 26949 + 691 = 27640
Step 41: 27640 + 691 = 28331
Step 42: 28331 + 691 = 29022
Step 43: 29022 + 691 = 29713
Step 44: 29713 + 691 = 30404
Step 45: 30404 + 691 = 31095
Step 46: 31095 + 691 = 31786
Step 47: 31786 + 691 = 32477
Step 48: 32477 + 691 = 33168
Step 49: 33168 + 691 = 33859
Step 50: 33859 + 691 = 34550
Step 51: 34550 + 691 = 35241
Step 52: 35241 + 691 = 35932
Step 53: 35932 + 691 = 36623
Step 54: 36623 + 691 = 37314
Step 55: 37314 + 691 = 38005
Step 56: 38005 + 691 = 38696
Step 57: 38696 + 691 = 39387
Step 58: 39387 + 691 = 40078
Step 59: 40078 + 691 = 40769
Step 60: 40769 + 691 = 41460
Step 61: 41460 + 691 = 42151
Step 62: 42151 + 691 = 42842
Step 63: 42842 + 691 = 43533
Step 64: 43533 + 691 = 44224
Step 65: 44224 + 691 = 44915
Step 66: 44915 + 691 = 45606
Step 67: 45606 + 691 = 46297
Step 68: 46297 + 691 = 46988
Step 69: 46988 + 691 = 47679
Step 70: 47679 + 691 = 48370
Step 71: 48370 + 691 = 49061
Step 72: 49061 + 691 = 49752
Step 73: 49752 + 691 = 50443
Step 74: 50443 + 691 = 51134
Step 75: 51134 + 691 = 51825
Step 76: 51825 + 691 = 52516
Step 77: 52516 + 691 = 53207
Step 78: 53207 + 691 = 53898
Step 79: 53898 + 691 = 54589
Step 80: 54589 + 691 = 55280
Step 81: 55280 + 691 = 55971
Step 82: 55971 + 691 = 56662
Step 83: 56662 + 691 = 57353
Step 84: 57353 + 691 = 58044
Step 85: 58044 + 691 = 58735
Step 86: 58735 + 691 = 59426
Step 87: 59426 + 691 = 60117

So, 691*87 = 60117