Alright, let's solve this math problem step by step. First, we have the number 129. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 98. So, we're going to take the number 129 and add it to itself 98 times.
Step 1: 0 + 129 = 129
Step 2: 129 + 129 = 258
Step 3: 258 + 129 = 387
Step 4: 387 + 129 = 516
Step 5: 516 + 129 = 645
Step 6: 645 + 129 = 774
Step 7: 774 + 129 = 903
Step 8: 903 + 129 = 1032
Step 9: 1032 + 129 = 1161
Step 10: 1161 + 129 = 1290
Step 11: 1290 + 129 = 1419
Step 12: 1419 + 129 = 1548
Step 13: 1548 + 129 = 1677
Step 14: 1677 + 129 = 1806
Step 15: 1806 + 129 = 1935
Step 16: 1935 + 129 = 2064
Step 17: 2064 + 129 = 2193
Step 18: 2193 + 129 = 2322
Step 19: 2322 + 129 = 2451
Step 20: 2451 + 129 = 2580
Step 21: 2580 + 129 = 2709
Step 22: 2709 + 129 = 2838
Step 23: 2838 + 129 = 2967
Step 24: 2967 + 129 = 3096
Step 25: 3096 + 129 = 3225
Step 26: 3225 + 129 = 3354
Step 27: 3354 + 129 = 3483
Step 28: 3483 + 129 = 3612
Step 29: 3612 + 129 = 3741
Step 30: 3741 + 129 = 3870
Step 31: 3870 + 129 = 3999
Step 32: 3999 + 129 = 4128
Step 33: 4128 + 129 = 4257
Step 34: 4257 + 129 = 4386
Step 35: 4386 + 129 = 4515
Step 36: 4515 + 129 = 4644
Step 37: 4644 + 129 = 4773
Step 38: 4773 + 129 = 4902
Step 39: 4902 + 129 = 5031
Step 40: 5031 + 129 = 5160
Step 41: 5160 + 129 = 5289
Step 42: 5289 + 129 = 5418
Step 43: 5418 + 129 = 5547
Step 44: 5547 + 129 = 5676
Step 45: 5676 + 129 = 5805
Step 46: 5805 + 129 = 5934
Step 47: 5934 + 129 = 6063
Step 48: 6063 + 129 = 6192
Step 49: 6192 + 129 = 6321
Step 50: 6321 + 129 = 6450
Step 51: 6450 + 129 = 6579
Step 52: 6579 + 129 = 6708
Step 53: 6708 + 129 = 6837
Step 54: 6837 + 129 = 6966
Step 55: 6966 + 129 = 7095
Step 56: 7095 + 129 = 7224
Step 57: 7224 + 129 = 7353
Step 58: 7353 + 129 = 7482
Step 59: 7482 + 129 = 7611
Step 60: 7611 + 129 = 7740
Step 61: 7740 + 129 = 7869
Step 62: 7869 + 129 = 7998
Step 63: 7998 + 129 = 8127
Step 64: 8127 + 129 = 8256
Step 65: 8256 + 129 = 8385
Step 66: 8385 + 129 = 8514
Step 67: 8514 + 129 = 8643
Step 68: 8643 + 129 = 8772
Step 69: 8772 + 129 = 8901
Step 70: 8901 + 129 = 9030
Step 71: 9030 + 129 = 9159
Step 72: 9159 + 129 = 9288
Step 73: 9288 + 129 = 9417
Step 74: 9417 + 129 = 9546
Step 75: 9546 + 129 = 9675
Step 76: 9675 + 129 = 9804
Step 77: 9804 + 129 = 9933
Step 78: 9933 + 129 = 10062
Step 79: 10062 + 129 = 10191
Step 80: 10191 + 129 = 10320
Step 81: 10320 + 129 = 10449
Step 82: 10449 + 129 = 10578
Step 83: 10578 + 129 = 10707
Step 84: 10707 + 129 = 10836
Step 85: 10836 + 129 = 10965
Step 86: 10965 + 129 = 11094
Step 87: 11094 + 129 = 11223
Step 88: 11223 + 129 = 11352
Step 89: 11352 + 129 = 11481
Step 90: 11481 + 129 = 11610
Step 91: 11610 + 129 = 11739
Step 92: 11739 + 129 = 11868
Step 93: 11868 + 129 = 11997
Step 94: 11997 + 129 = 12126
Step 95: 12126 + 129 = 12255
Step 96: 12255 + 129 = 12384
Step 97: 12384 + 129 = 12513
Step 98: 12513 + 129 = 12642

So, 129*98 = 12642