Alright, let's solve this math problem step by step. First, we have the number 403. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 156. So, we're going to take the number 403 and add it to itself 156 times.
Step 1: 0 + 403 = 403
Step 2: 403 + 403 = 806
Step 3: 806 + 403 = 1209
Step 4: 1209 + 403 = 1612
Step 5: 1612 + 403 = 2015
Step 6: 2015 + 403 = 2418
Step 7: 2418 + 403 = 2821
Step 8: 2821 + 403 = 3224
Step 9: 3224 + 403 = 3627
Step 10: 3627 + 403 = 4030
Step 11: 4030 + 403 = 4433
Step 12: 4433 + 403 = 4836
Step 13: 4836 + 403 = 5239
Step 14: 5239 + 403 = 5642
Step 15: 5642 + 403 = 6045
Step 16: 6045 + 403 = 6448
Step 17: 6448 + 403 = 6851
Step 18: 6851 + 403 = 7254
Step 19: 7254 + 403 = 7657
Step 20: 7657 + 403 = 8060
Step 21: 8060 + 403 = 8463
Step 22: 8463 + 403 = 8866
Step 23: 8866 + 403 = 9269
Step 24: 9269 + 403 = 9672
Step 25: 9672 + 403 = 10075
Step 26: 10075 + 403 = 10478
Step 27: 10478 + 403 = 10881
Step 28: 10881 + 403 = 11284
Step 29: 11284 + 403 = 11687
Step 30: 11687 + 403 = 12090
Step 31: 12090 + 403 = 12493
Step 32: 12493 + 403 = 12896
Step 33: 12896 + 403 = 13299
Step 34: 13299 + 403 = 13702
Step 35: 13702 + 403 = 14105
Step 36: 14105 + 403 = 14508
Step 37: 14508 + 403 = 14911
Step 38: 14911 + 403 = 15314
Step 39: 15314 + 403 = 15717
Step 40: 15717 + 403 = 16120
Step 41: 16120 + 403 = 16523
Step 42: 16523 + 403 = 16926
Step 43: 16926 + 403 = 17329
Step 44: 17329 + 403 = 17732
Step 45: 17732 + 403 = 18135
Step 46: 18135 + 403 = 18538
Step 47: 18538 + 403 = 18941
Step 48: 18941 + 403 = 19344
Step 49: 19344 + 403 = 19747
Step 50: 19747 + 403 = 20150
Step 51: 20150 + 403 = 20553
Step 52: 20553 + 403 = 20956
Step 53: 20956 + 403 = 21359
Step 54: 21359 + 403 = 21762
Step 55: 21762 + 403 = 22165
Step 56: 22165 + 403 = 22568
Step 57: 22568 + 403 = 22971
Step 58: 22971 + 403 = 23374
Step 59: 23374 + 403 = 23777
Step 60: 23777 + 403 = 24180
Step 61: 24180 + 403 = 24583
Step 62: 24583 + 403 = 24986
Step 63: 24986 + 403 = 25389
Step 64: 25389 + 403 = 25792
Step 65: 25792 + 403 = 26195
Step 66: 26195 + 403 = 26598
Step 67: 26598 + 403 = 27001
Step 68: 27001 + 403 = 27404
Step 69: 27404 + 403 = 27807
Step 70: 27807 + 403 = 28210
Step 71: 28210 + 403 = 28613
Step 72: 28613 + 403 = 29016
Step 73: 29016 + 403 = 29419
Step 74: 29419 + 403 = 29822
Step 75: 29822 + 403 = 30225
Step 76: 30225 + 403 = 30628
Step 77: 30628 + 403 = 31031
Step 78: 31031 + 403 = 31434
Step 79: 31434 + 403 = 31837
Step 80: 31837 + 403 = 32240
Step 81: 32240 + 403 = 32643
Step 82: 32643 + 403 = 33046
Step 83: 33046 + 403 = 33449
Step 84: 33449 + 403 = 33852
Step 85: 33852 + 403 = 34255
Step 86: 34255 + 403 = 34658
Step 87: 34658 + 403 = 35061
Step 88: 35061 + 403 = 35464
Step 89: 35464 + 403 = 35867
Step 90: 35867 + 403 = 36270
Step 91: 36270 + 403 = 36673
Step 92: 36673 + 403 = 37076
Step 93: 37076 + 403 = 37479
Step 94: 37479 + 403 = 37882
Step 95: 37882 + 403 = 38285
Step 96: 38285 + 403 = 38688
Step 97: 38688 + 403 = 39091
Step 98: 39091 + 403 = 39494
Step 99: 39494 + 403 = 39897
Step 100: 39897 + 403 = 40300
Step 101: 40300 + 403 = 40703
Step 102: 40703 + 403 = 41106
Step 103: 41106 + 403 = 41509
Step 104: 41509 + 403 = 41912
Step 105: 41912 + 403 = 42315
Step 106: 42315 + 403 = 42718
Step 107: 42718 + 403 = 43121
Step 108: 43121 + 403 = 43524
Step 109: 43524 + 403 = 43927
Step 110: 43927 + 403 = 44330
Step 111: 44330 + 403 = 44733
Step 112: 44733 + 403 = 45136
Step 113: 45136 + 403 = 45539
Step 114: 45539 + 403 = 45942
Step 115: 45942 + 403 = 46345
Step 116: 46345 + 403 = 46748
Step 117: 46748 + 403 = 47151
Step 118: 47151 + 403 = 47554
Step 119: 47554 + 403 = 47957
Step 120: 47957 + 403 = 48360
Step 121: 48360 + 403 = 48763
Step 122: 48763 + 403 = 49166
Step 123: 49166 + 403 = 49569
Step 124: 49569 + 403 = 49972
Step 125: 49972 + 403 = 50375
Step 126: 50375 + 403 = 50778
Step 127: 50778 + 403 = 51181
Step 128: 51181 + 403 = 51584
Step 129: 51584 + 403 = 51987
Step 130: 51987 + 403 = 52390
Step 131: 52390 + 403 = 52793
Step 132: 52793 + 403 = 53196
Step 133: 53196 + 403 = 53599
Step 134: 53599 + 403 = 54002
Step 135: 54002 + 403 = 54405
Step 136: 54405 + 403 = 54808
Step 137: 54808 + 403 = 55211
Step 138: 55211 + 403 = 55614
Step 139: 55614 + 403 = 56017
Step 140: 56017 + 403 = 56420
Step 141: 56420 + 403 = 56823
Step 142: 56823 + 403 = 57226
Step 143: 57226 + 403 = 57629
Step 144: 57629 + 403 = 58032
Step 145: 58032 + 403 = 58435
Step 146: 58435 + 403 = 58838
Step 147: 58838 + 403 = 59241
Step 148: 59241 + 403 = 59644
Step 149: 59644 + 403 = 60047
Step 150: 60047 + 403 = 60450
Step 151: 60450 + 403 = 60853
Step 152: 60853 + 403 = 61256
Step 153: 61256 + 403 = 61659
Step 154: 61659 + 403 = 62062
Step 155: 62062 + 403 = 62465
Step 156: 62465 + 403 = 62868

So, 403*156 = 62868