Let's get this math done. We have 827 and we're going to multiply it by 121. This is the same as taking 827 and adding it to itself 121 times.
Step 1: 0 + 827 = 827
Step 2: 827 + 827 = 1654
Step 3: 1654 + 827 = 2481
Step 4: 2481 + 827 = 3308
Step 5: 3308 + 827 = 4135
Step 6: 4135 + 827 = 4962
Step 7: 4962 + 827 = 5789
Step 8: 5789 + 827 = 6616
Step 9: 6616 + 827 = 7443
Step 10: 7443 + 827 = 8270
Step 11: 8270 + 827 = 9097
Step 12: 9097 + 827 = 9924
Step 13: 9924 + 827 = 10751
Step 14: 10751 + 827 = 11578
Step 15: 11578 + 827 = 12405
Step 16: 12405 + 827 = 13232
Step 17: 13232 + 827 = 14059
Step 18: 14059 + 827 = 14886
Step 19: 14886 + 827 = 15713
Step 20: 15713 + 827 = 16540
Step 21: 16540 + 827 = 17367
Step 22: 17367 + 827 = 18194
Step 23: 18194 + 827 = 19021
Step 24: 19021 + 827 = 19848
Step 25: 19848 + 827 = 20675
Step 26: 20675 + 827 = 21502
Step 27: 21502 + 827 = 22329
Step 28: 22329 + 827 = 23156
Step 29: 23156 + 827 = 23983
Step 30: 23983 + 827 = 24810
Step 31: 24810 + 827 = 25637
Step 32: 25637 + 827 = 26464
Step 33: 26464 + 827 = 27291
Step 34: 27291 + 827 = 28118
Step 35: 28118 + 827 = 28945
Step 36: 28945 + 827 = 29772
Step 37: 29772 + 827 = 30599
Step 38: 30599 + 827 = 31426
Step 39: 31426 + 827 = 32253
Step 40: 32253 + 827 = 33080
Step 41: 33080 + 827 = 33907
Step 42: 33907 + 827 = 34734
Step 43: 34734 + 827 = 35561
Step 44: 35561 + 827 = 36388
Step 45: 36388 + 827 = 37215
Step 46: 37215 + 827 = 38042
Step 47: 38042 + 827 = 38869
Step 48: 38869 + 827 = 39696
Step 49: 39696 + 827 = 40523
Step 50: 40523 + 827 = 41350
Step 51: 41350 + 827 = 42177
Step 52: 42177 + 827 = 43004
Step 53: 43004 + 827 = 43831
Step 54: 43831 + 827 = 44658
Step 55: 44658 + 827 = 45485
Step 56: 45485 + 827 = 46312
Step 57: 46312 + 827 = 47139
Step 58: 47139 + 827 = 47966
Step 59: 47966 + 827 = 48793
Step 60: 48793 + 827 = 49620
Step 61: 49620 + 827 = 50447
Step 62: 50447 + 827 = 51274
Step 63: 51274 + 827 = 52101
Step 64: 52101 + 827 = 52928
Step 65: 52928 + 827 = 53755
Step 66: 53755 + 827 = 54582
Step 67: 54582 + 827 = 55409
Step 68: 55409 + 827 = 56236
Step 69: 56236 + 827 = 57063
Step 70: 57063 + 827 = 57890
Step 71: 57890 + 827 = 58717
Step 72: 58717 + 827 = 59544
Step 73: 59544 + 827 = 60371
Step 74: 60371 + 827 = 61198
Step 75: 61198 + 827 = 62025
Step 76: 62025 + 827 = 62852
Step 77: 62852 + 827 = 63679
Step 78: 63679 + 827 = 64506
Step 79: 64506 + 827 = 65333
Step 80: 65333 + 827 = 66160
Step 81: 66160 + 827 = 66987
Step 82: 66987 + 827 = 67814
Step 83: 67814 + 827 = 68641
Step 84: 68641 + 827 = 69468
Step 85: 69468 + 827 = 70295
Step 86: 70295 + 827 = 71122
Step 87: 71122 + 827 = 71949
Step 88: 71949 + 827 = 72776
Step 89: 72776 + 827 = 73603
Step 90: 73603 + 827 = 74430
Step 91: 74430 + 827 = 75257
Step 92: 75257 + 827 = 76084
Step 93: 76084 + 827 = 76911
Step 94: 76911 + 827 = 77738
Step 95: 77738 + 827 = 78565
Step 96: 78565 + 827 = 79392
Step 97: 79392 + 827 = 80219
Step 98: 80219 + 827 = 81046
Step 99: 81046 + 827 = 81873
Step 100: 81873 + 827 = 82700
Step 101: 82700 + 827 = 83527
Step 102: 83527 + 827 = 84354
Step 103: 84354 + 827 = 85181
Step 104: 85181 + 827 = 86008
Step 105: 86008 + 827 = 86835
Step 106: 86835 + 827 = 87662
Step 107: 87662 + 827 = 88489
Step 108: 88489 + 827 = 89316
Step 109: 89316 + 827 = 90143
Step 110: 90143 + 827 = 90970
Step 111: 90970 + 827 = 91797
Step 112: 91797 + 827 = 92624
Step 113: 92624 + 827 = 93451
Step 114: 93451 + 827 = 94278
Step 115: 94278 + 827 = 95105
Step 116: 95105 + 827 = 95932
Step 117: 95932 + 827 = 96759
Step 118: 96759 + 827 = 97586
Step 119: 97586 + 827 = 98413
Step 120: 98413 + 827 = 99240
Step 121: 99240 + 827 = 100067

So, 827*121 = 100067