Let's roll up our sleeves and solve this. We have 337 and we're going to multiply it by 103, essentially adding 337 to itself 103 times.
Step 1: 0 + 337 = 337
Step 2: 337 + 337 = 674
Step 3: 674 + 337 = 1011
Step 4: 1011 + 337 = 1348
Step 5: 1348 + 337 = 1685
Step 6: 1685 + 337 = 2022
Step 7: 2022 + 337 = 2359
Step 8: 2359 + 337 = 2696
Step 9: 2696 + 337 = 3033
Step 10: 3033 + 337 = 3370
Step 11: 3370 + 337 = 3707
Step 12: 3707 + 337 = 4044
Step 13: 4044 + 337 = 4381
Step 14: 4381 + 337 = 4718
Step 15: 4718 + 337 = 5055
Step 16: 5055 + 337 = 5392
Step 17: 5392 + 337 = 5729
Step 18: 5729 + 337 = 6066
Step 19: 6066 + 337 = 6403
Step 20: 6403 + 337 = 6740
Step 21: 6740 + 337 = 7077
Step 22: 7077 + 337 = 7414
Step 23: 7414 + 337 = 7751
Step 24: 7751 + 337 = 8088
Step 25: 8088 + 337 = 8425
Step 26: 8425 + 337 = 8762
Step 27: 8762 + 337 = 9099
Step 28: 9099 + 337 = 9436
Step 29: 9436 + 337 = 9773
Step 30: 9773 + 337 = 10110
Step 31: 10110 + 337 = 10447
Step 32: 10447 + 337 = 10784
Step 33: 10784 + 337 = 11121
Step 34: 11121 + 337 = 11458
Step 35: 11458 + 337 = 11795
Step 36: 11795 + 337 = 12132
Step 37: 12132 + 337 = 12469
Step 38: 12469 + 337 = 12806
Step 39: 12806 + 337 = 13143
Step 40: 13143 + 337 = 13480
Step 41: 13480 + 337 = 13817
Step 42: 13817 + 337 = 14154
Step 43: 14154 + 337 = 14491
Step 44: 14491 + 337 = 14828
Step 45: 14828 + 337 = 15165
Step 46: 15165 + 337 = 15502
Step 47: 15502 + 337 = 15839
Step 48: 15839 + 337 = 16176
Step 49: 16176 + 337 = 16513
Step 50: 16513 + 337 = 16850
Step 51: 16850 + 337 = 17187
Step 52: 17187 + 337 = 17524
Step 53: 17524 + 337 = 17861
Step 54: 17861 + 337 = 18198
Step 55: 18198 + 337 = 18535
Step 56: 18535 + 337 = 18872
Step 57: 18872 + 337 = 19209
Step 58: 19209 + 337 = 19546
Step 59: 19546 + 337 = 19883
Step 60: 19883 + 337 = 20220
Step 61: 20220 + 337 = 20557
Step 62: 20557 + 337 = 20894
Step 63: 20894 + 337 = 21231
Step 64: 21231 + 337 = 21568
Step 65: 21568 + 337 = 21905
Step 66: 21905 + 337 = 22242
Step 67: 22242 + 337 = 22579
Step 68: 22579 + 337 = 22916
Step 69: 22916 + 337 = 23253
Step 70: 23253 + 337 = 23590
Step 71: 23590 + 337 = 23927
Step 72: 23927 + 337 = 24264
Step 73: 24264 + 337 = 24601
Step 74: 24601 + 337 = 24938
Step 75: 24938 + 337 = 25275
Step 76: 25275 + 337 = 25612
Step 77: 25612 + 337 = 25949
Step 78: 25949 + 337 = 26286
Step 79: 26286 + 337 = 26623
Step 80: 26623 + 337 = 26960
Step 81: 26960 + 337 = 27297
Step 82: 27297 + 337 = 27634
Step 83: 27634 + 337 = 27971
Step 84: 27971 + 337 = 28308
Step 85: 28308 + 337 = 28645
Step 86: 28645 + 337 = 28982
Step 87: 28982 + 337 = 29319
Step 88: 29319 + 337 = 29656
Step 89: 29656 + 337 = 29993
Step 90: 29993 + 337 = 30330
Step 91: 30330 + 337 = 30667
Step 92: 30667 + 337 = 31004
Step 93: 31004 + 337 = 31341
Step 94: 31341 + 337 = 31678
Step 95: 31678 + 337 = 32015
Step 96: 32015 + 337 = 32352
Step 97: 32352 + 337 = 32689
Step 98: 32689 + 337 = 33026
Step 99: 33026 + 337 = 33363
Step 100: 33363 + 337 = 33700
Step 101: 33700 + 337 = 34037
Step 102: 34037 + 337 = 34374
Step 103: 34374 + 337 = 34711

So, 337*103 = 34711