Alright, let's solve this math problem step by step. First, we have the number 103. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 129. So, we're going to take the number 103 and add it to itself 129 times.
Step 1: 0 + 103 = 103
Step 2: 103 + 103 = 206
Step 3: 206 + 103 = 309
Step 4: 309 + 103 = 412
Step 5: 412 + 103 = 515
Step 6: 515 + 103 = 618
Step 7: 618 + 103 = 721
Step 8: 721 + 103 = 824
Step 9: 824 + 103 = 927
Step 10: 927 + 103 = 1030
Step 11: 1030 + 103 = 1133
Step 12: 1133 + 103 = 1236
Step 13: 1236 + 103 = 1339
Step 14: 1339 + 103 = 1442
Step 15: 1442 + 103 = 1545
Step 16: 1545 + 103 = 1648
Step 17: 1648 + 103 = 1751
Step 18: 1751 + 103 = 1854
Step 19: 1854 + 103 = 1957
Step 20: 1957 + 103 = 2060
Step 21: 2060 + 103 = 2163
Step 22: 2163 + 103 = 2266
Step 23: 2266 + 103 = 2369
Step 24: 2369 + 103 = 2472
Step 25: 2472 + 103 = 2575
Step 26: 2575 + 103 = 2678
Step 27: 2678 + 103 = 2781
Step 28: 2781 + 103 = 2884
Step 29: 2884 + 103 = 2987
Step 30: 2987 + 103 = 3090
Step 31: 3090 + 103 = 3193
Step 32: 3193 + 103 = 3296
Step 33: 3296 + 103 = 3399
Step 34: 3399 + 103 = 3502
Step 35: 3502 + 103 = 3605
Step 36: 3605 + 103 = 3708
Step 37: 3708 + 103 = 3811
Step 38: 3811 + 103 = 3914
Step 39: 3914 + 103 = 4017
Step 40: 4017 + 103 = 4120
Step 41: 4120 + 103 = 4223
Step 42: 4223 + 103 = 4326
Step 43: 4326 + 103 = 4429
Step 44: 4429 + 103 = 4532
Step 45: 4532 + 103 = 4635
Step 46: 4635 + 103 = 4738
Step 47: 4738 + 103 = 4841
Step 48: 4841 + 103 = 4944
Step 49: 4944 + 103 = 5047
Step 50: 5047 + 103 = 5150
Step 51: 5150 + 103 = 5253
Step 52: 5253 + 103 = 5356
Step 53: 5356 + 103 = 5459
Step 54: 5459 + 103 = 5562
Step 55: 5562 + 103 = 5665
Step 56: 5665 + 103 = 5768
Step 57: 5768 + 103 = 5871
Step 58: 5871 + 103 = 5974
Step 59: 5974 + 103 = 6077
Step 60: 6077 + 103 = 6180
Step 61: 6180 + 103 = 6283
Step 62: 6283 + 103 = 6386
Step 63: 6386 + 103 = 6489
Step 64: 6489 + 103 = 6592
Step 65: 6592 + 103 = 6695
Step 66: 6695 + 103 = 6798
Step 67: 6798 + 103 = 6901
Step 68: 6901 + 103 = 7004
Step 69: 7004 + 103 = 7107
Step 70: 7107 + 103 = 7210
Step 71: 7210 + 103 = 7313
Step 72: 7313 + 103 = 7416
Step 73: 7416 + 103 = 7519
Step 74: 7519 + 103 = 7622
Step 75: 7622 + 103 = 7725
Step 76: 7725 + 103 = 7828
Step 77: 7828 + 103 = 7931
Step 78: 7931 + 103 = 8034
Step 79: 8034 + 103 = 8137
Step 80: 8137 + 103 = 8240
Step 81: 8240 + 103 = 8343
Step 82: 8343 + 103 = 8446
Step 83: 8446 + 103 = 8549
Step 84: 8549 + 103 = 8652
Step 85: 8652 + 103 = 8755
Step 86: 8755 + 103 = 8858
Step 87: 8858 + 103 = 8961
Step 88: 8961 + 103 = 9064
Step 89: 9064 + 103 = 9167
Step 90: 9167 + 103 = 9270
Step 91: 9270 + 103 = 9373
Step 92: 9373 + 103 = 9476
Step 93: 9476 + 103 = 9579
Step 94: 9579 + 103 = 9682
Step 95: 9682 + 103 = 9785
Step 96: 9785 + 103 = 9888
Step 97: 9888 + 103 = 9991
Step 98: 9991 + 103 = 10094
Step 99: 10094 + 103 = 10197
Step 100: 10197 + 103 = 10300
Step 101: 10300 + 103 = 10403
Step 102: 10403 + 103 = 10506
Step 103: 10506 + 103 = 10609
Step 104: 10609 + 103 = 10712
Step 105: 10712 + 103 = 10815
Step 106: 10815 + 103 = 10918
Step 107: 10918 + 103 = 11021
Step 108: 11021 + 103 = 11124
Step 109: 11124 + 103 = 11227
Step 110: 11227 + 103 = 11330
Step 111: 11330 + 103 = 11433
Step 112: 11433 + 103 = 11536
Step 113: 11536 + 103 = 11639
Step 114: 11639 + 103 = 11742
Step 115: 11742 + 103 = 11845
Step 116: 11845 + 103 = 11948
Step 117: 11948 + 103 = 12051
Step 118: 12051 + 103 = 12154
Step 119: 12154 + 103 = 12257
Step 120: 12257 + 103 = 12360
Step 121: 12360 + 103 = 12463
Step 122: 12463 + 103 = 12566
Step 123: 12566 + 103 = 12669
Step 124: 12669 + 103 = 12772
Step 125: 12772 + 103 = 12875
Step 126: 12875 + 103 = 12978
Step 127: 12978 + 103 = 13081
Step 128: 13081 + 103 = 13184
Step 129: 13184 + 103 = 13287

So, 103*129 = 13287