OK, let's work through this together. We're starting with 58 and we're going to multiply it by 143, which means we add 58 to itself 143 times.
Step 1: 0 + 58 = 58
Step 2: 58 + 58 = 116
Step 3: 116 + 58 = 174
Step 4: 174 + 58 = 232
Step 5: 232 + 58 = 290
Step 6: 290 + 58 = 348
Step 7: 348 + 58 = 406
Step 8: 406 + 58 = 464
Step 9: 464 + 58 = 522
Step 10: 522 + 58 = 580
Step 11: 580 + 58 = 638
Step 12: 638 + 58 = 696
Step 13: 696 + 58 = 754
Step 14: 754 + 58 = 812
Step 15: 812 + 58 = 870
Step 16: 870 + 58 = 928
Step 17: 928 + 58 = 986
Step 18: 986 + 58 = 1044
Step 19: 1044 + 58 = 1102
Step 20: 1102 + 58 = 1160
Step 21: 1160 + 58 = 1218
Step 22: 1218 + 58 = 1276
Step 23: 1276 + 58 = 1334
Step 24: 1334 + 58 = 1392
Step 25: 1392 + 58 = 1450
Step 26: 1450 + 58 = 1508
Step 27: 1508 + 58 = 1566
Step 28: 1566 + 58 = 1624
Step 29: 1624 + 58 = 1682
Step 30: 1682 + 58 = 1740
Step 31: 1740 + 58 = 1798
Step 32: 1798 + 58 = 1856
Step 33: 1856 + 58 = 1914
Step 34: 1914 + 58 = 1972
Step 35: 1972 + 58 = 2030
Step 36: 2030 + 58 = 2088
Step 37: 2088 + 58 = 2146
Step 38: 2146 + 58 = 2204
Step 39: 2204 + 58 = 2262
Step 40: 2262 + 58 = 2320
Step 41: 2320 + 58 = 2378
Step 42: 2378 + 58 = 2436
Step 43: 2436 + 58 = 2494
Step 44: 2494 + 58 = 2552
Step 45: 2552 + 58 = 2610
Step 46: 2610 + 58 = 2668
Step 47: 2668 + 58 = 2726
Step 48: 2726 + 58 = 2784
Step 49: 2784 + 58 = 2842
Step 50: 2842 + 58 = 2900
Step 51: 2900 + 58 = 2958
Step 52: 2958 + 58 = 3016
Step 53: 3016 + 58 = 3074
Step 54: 3074 + 58 = 3132
Step 55: 3132 + 58 = 3190
Step 56: 3190 + 58 = 3248
Step 57: 3248 + 58 = 3306
Step 58: 3306 + 58 = 3364
Step 59: 3364 + 58 = 3422
Step 60: 3422 + 58 = 3480
Step 61: 3480 + 58 = 3538
Step 62: 3538 + 58 = 3596
Step 63: 3596 + 58 = 3654
Step 64: 3654 + 58 = 3712
Step 65: 3712 + 58 = 3770
Step 66: 3770 + 58 = 3828
Step 67: 3828 + 58 = 3886
Step 68: 3886 + 58 = 3944
Step 69: 3944 + 58 = 4002
Step 70: 4002 + 58 = 4060
Step 71: 4060 + 58 = 4118
Step 72: 4118 + 58 = 4176
Step 73: 4176 + 58 = 4234
Step 74: 4234 + 58 = 4292
Step 75: 4292 + 58 = 4350
Step 76: 4350 + 58 = 4408
Step 77: 4408 + 58 = 4466
Step 78: 4466 + 58 = 4524
Step 79: 4524 + 58 = 4582
Step 80: 4582 + 58 = 4640
Step 81: 4640 + 58 = 4698
Step 82: 4698 + 58 = 4756
Step 83: 4756 + 58 = 4814
Step 84: 4814 + 58 = 4872
Step 85: 4872 + 58 = 4930
Step 86: 4930 + 58 = 4988
Step 87: 4988 + 58 = 5046
Step 88: 5046 + 58 = 5104
Step 89: 5104 + 58 = 5162
Step 90: 5162 + 58 = 5220
Step 91: 5220 + 58 = 5278
Step 92: 5278 + 58 = 5336
Step 93: 5336 + 58 = 5394
Step 94: 5394 + 58 = 5452
Step 95: 5452 + 58 = 5510
Step 96: 5510 + 58 = 5568
Step 97: 5568 + 58 = 5626
Step 98: 5626 + 58 = 5684
Step 99: 5684 + 58 = 5742
Step 100: 5742 + 58 = 5800
Step 101: 5800 + 58 = 5858
Step 102: 5858 + 58 = 5916
Step 103: 5916 + 58 = 5974
Step 104: 5974 + 58 = 6032
Step 105: 6032 + 58 = 6090
Step 106: 6090 + 58 = 6148
Step 107: 6148 + 58 = 6206
Step 108: 6206 + 58 = 6264
Step 109: 6264 + 58 = 6322
Step 110: 6322 + 58 = 6380
Step 111: 6380 + 58 = 6438
Step 112: 6438 + 58 = 6496
Step 113: 6496 + 58 = 6554
Step 114: 6554 + 58 = 6612
Step 115: 6612 + 58 = 6670
Step 116: 6670 + 58 = 6728
Step 117: 6728 + 58 = 6786
Step 118: 6786 + 58 = 6844
Step 119: 6844 + 58 = 6902
Step 120: 6902 + 58 = 6960
Step 121: 6960 + 58 = 7018
Step 122: 7018 + 58 = 7076
Step 123: 7076 + 58 = 7134
Step 124: 7134 + 58 = 7192
Step 125: 7192 + 58 = 7250
Step 126: 7250 + 58 = 7308
Step 127: 7308 + 58 = 7366
Step 128: 7366 + 58 = 7424
Step 129: 7424 + 58 = 7482
Step 130: 7482 + 58 = 7540
Step 131: 7540 + 58 = 7598
Step 132: 7598 + 58 = 7656
Step 133: 7656 + 58 = 7714
Step 134: 7714 + 58 = 7772
Step 135: 7772 + 58 = 7830
Step 136: 7830 + 58 = 7888
Step 137: 7888 + 58 = 7946
Step 138: 7946 + 58 = 8004
Step 139: 8004 + 58 = 8062
Step 140: 8062 + 58 = 8120
Step 141: 8120 + 58 = 8178
Step 142: 8178 + 58 = 8236
Step 143: 8236 + 58 = 8294

So, 58*143 = 8294