OK, let's work through this together. We're starting with 239 and we're going to multiply it by 125, which means we add 239 to itself 125 times.
Step 1: 0 + 239 = 239
Step 2: 239 + 239 = 478
Step 3: 478 + 239 = 717
Step 4: 717 + 239 = 956
Step 5: 956 + 239 = 1195
Step 6: 1195 + 239 = 1434
Step 7: 1434 + 239 = 1673
Step 8: 1673 + 239 = 1912
Step 9: 1912 + 239 = 2151
Step 10: 2151 + 239 = 2390
Step 11: 2390 + 239 = 2629
Step 12: 2629 + 239 = 2868
Step 13: 2868 + 239 = 3107
Step 14: 3107 + 239 = 3346
Step 15: 3346 + 239 = 3585
Step 16: 3585 + 239 = 3824
Step 17: 3824 + 239 = 4063
Step 18: 4063 + 239 = 4302
Step 19: 4302 + 239 = 4541
Step 20: 4541 + 239 = 4780
Step 21: 4780 + 239 = 5019
Step 22: 5019 + 239 = 5258
Step 23: 5258 + 239 = 5497
Step 24: 5497 + 239 = 5736
Step 25: 5736 + 239 = 5975
Step 26: 5975 + 239 = 6214
Step 27: 6214 + 239 = 6453
Step 28: 6453 + 239 = 6692
Step 29: 6692 + 239 = 6931
Step 30: 6931 + 239 = 7170
Step 31: 7170 + 239 = 7409
Step 32: 7409 + 239 = 7648
Step 33: 7648 + 239 = 7887
Step 34: 7887 + 239 = 8126
Step 35: 8126 + 239 = 8365
Step 36: 8365 + 239 = 8604
Step 37: 8604 + 239 = 8843
Step 38: 8843 + 239 = 9082
Step 39: 9082 + 239 = 9321
Step 40: 9321 + 239 = 9560
Step 41: 9560 + 239 = 9799
Step 42: 9799 + 239 = 10038
Step 43: 10038 + 239 = 10277
Step 44: 10277 + 239 = 10516
Step 45: 10516 + 239 = 10755
Step 46: 10755 + 239 = 10994
Step 47: 10994 + 239 = 11233
Step 48: 11233 + 239 = 11472
Step 49: 11472 + 239 = 11711
Step 50: 11711 + 239 = 11950
Step 51: 11950 + 239 = 12189
Step 52: 12189 + 239 = 12428
Step 53: 12428 + 239 = 12667
Step 54: 12667 + 239 = 12906
Step 55: 12906 + 239 = 13145
Step 56: 13145 + 239 = 13384
Step 57: 13384 + 239 = 13623
Step 58: 13623 + 239 = 13862
Step 59: 13862 + 239 = 14101
Step 60: 14101 + 239 = 14340
Step 61: 14340 + 239 = 14579
Step 62: 14579 + 239 = 14818
Step 63: 14818 + 239 = 15057
Step 64: 15057 + 239 = 15296
Step 65: 15296 + 239 = 15535
Step 66: 15535 + 239 = 15774
Step 67: 15774 + 239 = 16013
Step 68: 16013 + 239 = 16252
Step 69: 16252 + 239 = 16491
Step 70: 16491 + 239 = 16730
Step 71: 16730 + 239 = 16969
Step 72: 16969 + 239 = 17208
Step 73: 17208 + 239 = 17447
Step 74: 17447 + 239 = 17686
Step 75: 17686 + 239 = 17925
Step 76: 17925 + 239 = 18164
Step 77: 18164 + 239 = 18403
Step 78: 18403 + 239 = 18642
Step 79: 18642 + 239 = 18881
Step 80: 18881 + 239 = 19120
Step 81: 19120 + 239 = 19359
Step 82: 19359 + 239 = 19598
Step 83: 19598 + 239 = 19837
Step 84: 19837 + 239 = 20076
Step 85: 20076 + 239 = 20315
Step 86: 20315 + 239 = 20554
Step 87: 20554 + 239 = 20793
Step 88: 20793 + 239 = 21032
Step 89: 21032 + 239 = 21271
Step 90: 21271 + 239 = 21510
Step 91: 21510 + 239 = 21749
Step 92: 21749 + 239 = 21988
Step 93: 21988 + 239 = 22227
Step 94: 22227 + 239 = 22466
Step 95: 22466 + 239 = 22705
Step 96: 22705 + 239 = 22944
Step 97: 22944 + 239 = 23183
Step 98: 23183 + 239 = 23422
Step 99: 23422 + 239 = 23661
Step 100: 23661 + 239 = 23900
Step 101: 23900 + 239 = 24139
Step 102: 24139 + 239 = 24378
Step 103: 24378 + 239 = 24617
Step 104: 24617 + 239 = 24856
Step 105: 24856 + 239 = 25095
Step 106: 25095 + 239 = 25334
Step 107: 25334 + 239 = 25573
Step 108: 25573 + 239 = 25812
Step 109: 25812 + 239 = 26051
Step 110: 26051 + 239 = 26290
Step 111: 26290 + 239 = 26529
Step 112: 26529 + 239 = 26768
Step 113: 26768 + 239 = 27007
Step 114: 27007 + 239 = 27246
Step 115: 27246 + 239 = 27485
Step 116: 27485 + 239 = 27724
Step 117: 27724 + 239 = 27963
Step 118: 27963 + 239 = 28202
Step 119: 28202 + 239 = 28441
Step 120: 28441 + 239 = 28680
Step 121: 28680 + 239 = 28919
Step 122: 28919 + 239 = 29158
Step 123: 29158 + 239 = 29397
Step 124: 29397 + 239 = 29636
Step 125: 29636 + 239 = 29875

So, 239*125 = 29875