Let's roll up our sleeves and solve this. We have 141 and we're going to multiply it by 69, essentially adding 141 to itself 69 times.
Step 1: 0 + 141 = 141
Step 2: 141 + 141 = 282
Step 3: 282 + 141 = 423
Step 4: 423 + 141 = 564
Step 5: 564 + 141 = 705
Step 6: 705 + 141 = 846
Step 7: 846 + 141 = 987
Step 8: 987 + 141 = 1128
Step 9: 1128 + 141 = 1269
Step 10: 1269 + 141 = 1410
Step 11: 1410 + 141 = 1551
Step 12: 1551 + 141 = 1692
Step 13: 1692 + 141 = 1833
Step 14: 1833 + 141 = 1974
Step 15: 1974 + 141 = 2115
Step 16: 2115 + 141 = 2256
Step 17: 2256 + 141 = 2397
Step 18: 2397 + 141 = 2538
Step 19: 2538 + 141 = 2679
Step 20: 2679 + 141 = 2820
Step 21: 2820 + 141 = 2961
Step 22: 2961 + 141 = 3102
Step 23: 3102 + 141 = 3243
Step 24: 3243 + 141 = 3384
Step 25: 3384 + 141 = 3525
Step 26: 3525 + 141 = 3666
Step 27: 3666 + 141 = 3807
Step 28: 3807 + 141 = 3948
Step 29: 3948 + 141 = 4089
Step 30: 4089 + 141 = 4230
Step 31: 4230 + 141 = 4371
Step 32: 4371 + 141 = 4512
Step 33: 4512 + 141 = 4653
Step 34: 4653 + 141 = 4794
Step 35: 4794 + 141 = 4935
Step 36: 4935 + 141 = 5076
Step 37: 5076 + 141 = 5217
Step 38: 5217 + 141 = 5358
Step 39: 5358 + 141 = 5499
Step 40: 5499 + 141 = 5640
Step 41: 5640 + 141 = 5781
Step 42: 5781 + 141 = 5922
Step 43: 5922 + 141 = 6063
Step 44: 6063 + 141 = 6204
Step 45: 6204 + 141 = 6345
Step 46: 6345 + 141 = 6486
Step 47: 6486 + 141 = 6627
Step 48: 6627 + 141 = 6768
Step 49: 6768 + 141 = 6909
Step 50: 6909 + 141 = 7050
Step 51: 7050 + 141 = 7191
Step 52: 7191 + 141 = 7332
Step 53: 7332 + 141 = 7473
Step 54: 7473 + 141 = 7614
Step 55: 7614 + 141 = 7755
Step 56: 7755 + 141 = 7896
Step 57: 7896 + 141 = 8037
Step 58: 8037 + 141 = 8178
Step 59: 8178 + 141 = 8319
Step 60: 8319 + 141 = 8460
Step 61: 8460 + 141 = 8601
Step 62: 8601 + 141 = 8742
Step 63: 8742 + 141 = 8883
Step 64: 8883 + 141 = 9024
Step 65: 9024 + 141 = 9165
Step 66: 9165 + 141 = 9306
Step 67: 9306 + 141 = 9447
Step 68: 9447 + 141 = 9588
Step 69: 9588 + 141 = 9729

So, 141*69 = 9729