Sure thing, let's get straight to it. We start with 349 and we're going to multiply it by 121, which means adding 349 to itself 121 times.
Step 1: 0 + 349 = 349
Step 2: 349 + 349 = 698
Step 3: 698 + 349 = 1047
Step 4: 1047 + 349 = 1396
Step 5: 1396 + 349 = 1745
Step 6: 1745 + 349 = 2094
Step 7: 2094 + 349 = 2443
Step 8: 2443 + 349 = 2792
Step 9: 2792 + 349 = 3141
Step 10: 3141 + 349 = 3490
Step 11: 3490 + 349 = 3839
Step 12: 3839 + 349 = 4188
Step 13: 4188 + 349 = 4537
Step 14: 4537 + 349 = 4886
Step 15: 4886 + 349 = 5235
Step 16: 5235 + 349 = 5584
Step 17: 5584 + 349 = 5933
Step 18: 5933 + 349 = 6282
Step 19: 6282 + 349 = 6631
Step 20: 6631 + 349 = 6980
Step 21: 6980 + 349 = 7329
Step 22: 7329 + 349 = 7678
Step 23: 7678 + 349 = 8027
Step 24: 8027 + 349 = 8376
Step 25: 8376 + 349 = 8725
Step 26: 8725 + 349 = 9074
Step 27: 9074 + 349 = 9423
Step 28: 9423 + 349 = 9772
Step 29: 9772 + 349 = 10121
Step 30: 10121 + 349 = 10470
Step 31: 10470 + 349 = 10819
Step 32: 10819 + 349 = 11168
Step 33: 11168 + 349 = 11517
Step 34: 11517 + 349 = 11866
Step 35: 11866 + 349 = 12215
Step 36: 12215 + 349 = 12564
Step 37: 12564 + 349 = 12913
Step 38: 12913 + 349 = 13262
Step 39: 13262 + 349 = 13611
Step 40: 13611 + 349 = 13960
Step 41: 13960 + 349 = 14309
Step 42: 14309 + 349 = 14658
Step 43: 14658 + 349 = 15007
Step 44: 15007 + 349 = 15356
Step 45: 15356 + 349 = 15705
Step 46: 15705 + 349 = 16054
Step 47: 16054 + 349 = 16403
Step 48: 16403 + 349 = 16752
Step 49: 16752 + 349 = 17101
Step 50: 17101 + 349 = 17450
Step 51: 17450 + 349 = 17799
Step 52: 17799 + 349 = 18148
Step 53: 18148 + 349 = 18497
Step 54: 18497 + 349 = 18846
Step 55: 18846 + 349 = 19195
Step 56: 19195 + 349 = 19544
Step 57: 19544 + 349 = 19893
Step 58: 19893 + 349 = 20242
Step 59: 20242 + 349 = 20591
Step 60: 20591 + 349 = 20940
Step 61: 20940 + 349 = 21289
Step 62: 21289 + 349 = 21638
Step 63: 21638 + 349 = 21987
Step 64: 21987 + 349 = 22336
Step 65: 22336 + 349 = 22685
Step 66: 22685 + 349 = 23034
Step 67: 23034 + 349 = 23383
Step 68: 23383 + 349 = 23732
Step 69: 23732 + 349 = 24081
Step 70: 24081 + 349 = 24430
Step 71: 24430 + 349 = 24779
Step 72: 24779 + 349 = 25128
Step 73: 25128 + 349 = 25477
Step 74: 25477 + 349 = 25826
Step 75: 25826 + 349 = 26175
Step 76: 26175 + 349 = 26524
Step 77: 26524 + 349 = 26873
Step 78: 26873 + 349 = 27222
Step 79: 27222 + 349 = 27571
Step 80: 27571 + 349 = 27920
Step 81: 27920 + 349 = 28269
Step 82: 28269 + 349 = 28618
Step 83: 28618 + 349 = 28967
Step 84: 28967 + 349 = 29316
Step 85: 29316 + 349 = 29665
Step 86: 29665 + 349 = 30014
Step 87: 30014 + 349 = 30363
Step 88: 30363 + 349 = 30712
Step 89: 30712 + 349 = 31061
Step 90: 31061 + 349 = 31410
Step 91: 31410 + 349 = 31759
Step 92: 31759 + 349 = 32108
Step 93: 32108 + 349 = 32457
Step 94: 32457 + 349 = 32806
Step 95: 32806 + 349 = 33155
Step 96: 33155 + 349 = 33504
Step 97: 33504 + 349 = 33853
Step 98: 33853 + 349 = 34202
Step 99: 34202 + 349 = 34551
Step 100: 34551 + 349 = 34900
Step 101: 34900 + 349 = 35249
Step 102: 35249 + 349 = 35598
Step 103: 35598 + 349 = 35947
Step 104: 35947 + 349 = 36296
Step 105: 36296 + 349 = 36645
Step 106: 36645 + 349 = 36994
Step 107: 36994 + 349 = 37343
Step 108: 37343 + 349 = 37692
Step 109: 37692 + 349 = 38041
Step 110: 38041 + 349 = 38390
Step 111: 38390 + 349 = 38739
Step 112: 38739 + 349 = 39088
Step 113: 39088 + 349 = 39437
Step 114: 39437 + 349 = 39786
Step 115: 39786 + 349 = 40135
Step 116: 40135 + 349 = 40484
Step 117: 40484 + 349 = 40833
Step 118: 40833 + 349 = 41182
Step 119: 41182 + 349 = 41531
Step 120: 41531 + 349 = 41880
Step 121: 41880 + 349 = 42229

So, 349*121 = 42229