Alright, let's solve this math problem step by step. First, we have the number 801. 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 801 and add it to itself 129 times.
Step 1: 0 + 801 = 801
Step 2: 801 + 801 = 1602
Step 3: 1602 + 801 = 2403
Step 4: 2403 + 801 = 3204
Step 5: 3204 + 801 = 4005
Step 6: 4005 + 801 = 4806
Step 7: 4806 + 801 = 5607
Step 8: 5607 + 801 = 6408
Step 9: 6408 + 801 = 7209
Step 10: 7209 + 801 = 8010
Step 11: 8010 + 801 = 8811
Step 12: 8811 + 801 = 9612
Step 13: 9612 + 801 = 10413
Step 14: 10413 + 801 = 11214
Step 15: 11214 + 801 = 12015
Step 16: 12015 + 801 = 12816
Step 17: 12816 + 801 = 13617
Step 18: 13617 + 801 = 14418
Step 19: 14418 + 801 = 15219
Step 20: 15219 + 801 = 16020
Step 21: 16020 + 801 = 16821
Step 22: 16821 + 801 = 17622
Step 23: 17622 + 801 = 18423
Step 24: 18423 + 801 = 19224
Step 25: 19224 + 801 = 20025
Step 26: 20025 + 801 = 20826
Step 27: 20826 + 801 = 21627
Step 28: 21627 + 801 = 22428
Step 29: 22428 + 801 = 23229
Step 30: 23229 + 801 = 24030
Step 31: 24030 + 801 = 24831
Step 32: 24831 + 801 = 25632
Step 33: 25632 + 801 = 26433
Step 34: 26433 + 801 = 27234
Step 35: 27234 + 801 = 28035
Step 36: 28035 + 801 = 28836
Step 37: 28836 + 801 = 29637
Step 38: 29637 + 801 = 30438
Step 39: 30438 + 801 = 31239
Step 40: 31239 + 801 = 32040
Step 41: 32040 + 801 = 32841
Step 42: 32841 + 801 = 33642
Step 43: 33642 + 801 = 34443
Step 44: 34443 + 801 = 35244
Step 45: 35244 + 801 = 36045
Step 46: 36045 + 801 = 36846
Step 47: 36846 + 801 = 37647
Step 48: 37647 + 801 = 38448
Step 49: 38448 + 801 = 39249
Step 50: 39249 + 801 = 40050
Step 51: 40050 + 801 = 40851
Step 52: 40851 + 801 = 41652
Step 53: 41652 + 801 = 42453
Step 54: 42453 + 801 = 43254
Step 55: 43254 + 801 = 44055
Step 56: 44055 + 801 = 44856
Step 57: 44856 + 801 = 45657
Step 58: 45657 + 801 = 46458
Step 59: 46458 + 801 = 47259
Step 60: 47259 + 801 = 48060
Step 61: 48060 + 801 = 48861
Step 62: 48861 + 801 = 49662
Step 63: 49662 + 801 = 50463
Step 64: 50463 + 801 = 51264
Step 65: 51264 + 801 = 52065
Step 66: 52065 + 801 = 52866
Step 67: 52866 + 801 = 53667
Step 68: 53667 + 801 = 54468
Step 69: 54468 + 801 = 55269
Step 70: 55269 + 801 = 56070
Step 71: 56070 + 801 = 56871
Step 72: 56871 + 801 = 57672
Step 73: 57672 + 801 = 58473
Step 74: 58473 + 801 = 59274
Step 75: 59274 + 801 = 60075
Step 76: 60075 + 801 = 60876
Step 77: 60876 + 801 = 61677
Step 78: 61677 + 801 = 62478
Step 79: 62478 + 801 = 63279
Step 80: 63279 + 801 = 64080
Step 81: 64080 + 801 = 64881
Step 82: 64881 + 801 = 65682
Step 83: 65682 + 801 = 66483
Step 84: 66483 + 801 = 67284
Step 85: 67284 + 801 = 68085
Step 86: 68085 + 801 = 68886
Step 87: 68886 + 801 = 69687
Step 88: 69687 + 801 = 70488
Step 89: 70488 + 801 = 71289
Step 90: 71289 + 801 = 72090
Step 91: 72090 + 801 = 72891
Step 92: 72891 + 801 = 73692
Step 93: 73692 + 801 = 74493
Step 94: 74493 + 801 = 75294
Step 95: 75294 + 801 = 76095
Step 96: 76095 + 801 = 76896
Step 97: 76896 + 801 = 77697
Step 98: 77697 + 801 = 78498
Step 99: 78498 + 801 = 79299
Step 100: 79299 + 801 = 80100
Step 101: 80100 + 801 = 80901
Step 102: 80901 + 801 = 81702
Step 103: 81702 + 801 = 82503
Step 104: 82503 + 801 = 83304
Step 105: 83304 + 801 = 84105
Step 106: 84105 + 801 = 84906
Step 107: 84906 + 801 = 85707
Step 108: 85707 + 801 = 86508
Step 109: 86508 + 801 = 87309
Step 110: 87309 + 801 = 88110
Step 111: 88110 + 801 = 88911
Step 112: 88911 + 801 = 89712
Step 113: 89712 + 801 = 90513
Step 114: 90513 + 801 = 91314
Step 115: 91314 + 801 = 92115
Step 116: 92115 + 801 = 92916
Step 117: 92916 + 801 = 93717
Step 118: 93717 + 801 = 94518
Step 119: 94518 + 801 = 95319
Step 120: 95319 + 801 = 96120
Step 121: 96120 + 801 = 96921
Step 122: 96921 + 801 = 97722
Step 123: 97722 + 801 = 98523
Step 124: 98523 + 801 = 99324
Step 125: 99324 + 801 = 100125
Step 126: 100125 + 801 = 100926
Step 127: 100926 + 801 = 101727
Step 128: 101727 + 801 = 102528
Step 129: 102528 + 801 = 103329

So, 801*129 = 103329