Sure thing, let's get straight to it. We start with 401 and we're going to multiply it by 136, which means adding 401 to itself 136 times.
Step 1: 0 + 401 = 401
Step 2: 401 + 401 = 802
Step 3: 802 + 401 = 1203
Step 4: 1203 + 401 = 1604
Step 5: 1604 + 401 = 2005
Step 6: 2005 + 401 = 2406
Step 7: 2406 + 401 = 2807
Step 8: 2807 + 401 = 3208
Step 9: 3208 + 401 = 3609
Step 10: 3609 + 401 = 4010
Step 11: 4010 + 401 = 4411
Step 12: 4411 + 401 = 4812
Step 13: 4812 + 401 = 5213
Step 14: 5213 + 401 = 5614
Step 15: 5614 + 401 = 6015
Step 16: 6015 + 401 = 6416
Step 17: 6416 + 401 = 6817
Step 18: 6817 + 401 = 7218
Step 19: 7218 + 401 = 7619
Step 20: 7619 + 401 = 8020
Step 21: 8020 + 401 = 8421
Step 22: 8421 + 401 = 8822
Step 23: 8822 + 401 = 9223
Step 24: 9223 + 401 = 9624
Step 25: 9624 + 401 = 10025
Step 26: 10025 + 401 = 10426
Step 27: 10426 + 401 = 10827
Step 28: 10827 + 401 = 11228
Step 29: 11228 + 401 = 11629
Step 30: 11629 + 401 = 12030
Step 31: 12030 + 401 = 12431
Step 32: 12431 + 401 = 12832
Step 33: 12832 + 401 = 13233
Step 34: 13233 + 401 = 13634
Step 35: 13634 + 401 = 14035
Step 36: 14035 + 401 = 14436
Step 37: 14436 + 401 = 14837
Step 38: 14837 + 401 = 15238
Step 39: 15238 + 401 = 15639
Step 40: 15639 + 401 = 16040
Step 41: 16040 + 401 = 16441
Step 42: 16441 + 401 = 16842
Step 43: 16842 + 401 = 17243
Step 44: 17243 + 401 = 17644
Step 45: 17644 + 401 = 18045
Step 46: 18045 + 401 = 18446
Step 47: 18446 + 401 = 18847
Step 48: 18847 + 401 = 19248
Step 49: 19248 + 401 = 19649
Step 50: 19649 + 401 = 20050
Step 51: 20050 + 401 = 20451
Step 52: 20451 + 401 = 20852
Step 53: 20852 + 401 = 21253
Step 54: 21253 + 401 = 21654
Step 55: 21654 + 401 = 22055
Step 56: 22055 + 401 = 22456
Step 57: 22456 + 401 = 22857
Step 58: 22857 + 401 = 23258
Step 59: 23258 + 401 = 23659
Step 60: 23659 + 401 = 24060
Step 61: 24060 + 401 = 24461
Step 62: 24461 + 401 = 24862
Step 63: 24862 + 401 = 25263
Step 64: 25263 + 401 = 25664
Step 65: 25664 + 401 = 26065
Step 66: 26065 + 401 = 26466
Step 67: 26466 + 401 = 26867
Step 68: 26867 + 401 = 27268
Step 69: 27268 + 401 = 27669
Step 70: 27669 + 401 = 28070
Step 71: 28070 + 401 = 28471
Step 72: 28471 + 401 = 28872
Step 73: 28872 + 401 = 29273
Step 74: 29273 + 401 = 29674
Step 75: 29674 + 401 = 30075
Step 76: 30075 + 401 = 30476
Step 77: 30476 + 401 = 30877
Step 78: 30877 + 401 = 31278
Step 79: 31278 + 401 = 31679
Step 80: 31679 + 401 = 32080
Step 81: 32080 + 401 = 32481
Step 82: 32481 + 401 = 32882
Step 83: 32882 + 401 = 33283
Step 84: 33283 + 401 = 33684
Step 85: 33684 + 401 = 34085
Step 86: 34085 + 401 = 34486
Step 87: 34486 + 401 = 34887
Step 88: 34887 + 401 = 35288
Step 89: 35288 + 401 = 35689
Step 90: 35689 + 401 = 36090
Step 91: 36090 + 401 = 36491
Step 92: 36491 + 401 = 36892
Step 93: 36892 + 401 = 37293
Step 94: 37293 + 401 = 37694
Step 95: 37694 + 401 = 38095
Step 96: 38095 + 401 = 38496
Step 97: 38496 + 401 = 38897
Step 98: 38897 + 401 = 39298
Step 99: 39298 + 401 = 39699
Step 100: 39699 + 401 = 40100
Step 101: 40100 + 401 = 40501
Step 102: 40501 + 401 = 40902
Step 103: 40902 + 401 = 41303
Step 104: 41303 + 401 = 41704
Step 105: 41704 + 401 = 42105
Step 106: 42105 + 401 = 42506
Step 107: 42506 + 401 = 42907
Step 108: 42907 + 401 = 43308
Step 109: 43308 + 401 = 43709
Step 110: 43709 + 401 = 44110
Step 111: 44110 + 401 = 44511
Step 112: 44511 + 401 = 44912
Step 113: 44912 + 401 = 45313
Step 114: 45313 + 401 = 45714
Step 115: 45714 + 401 = 46115
Step 116: 46115 + 401 = 46516
Step 117: 46516 + 401 = 46917
Step 118: 46917 + 401 = 47318
Step 119: 47318 + 401 = 47719
Step 120: 47719 + 401 = 48120
Step 121: 48120 + 401 = 48521
Step 122: 48521 + 401 = 48922
Step 123: 48922 + 401 = 49323
Step 124: 49323 + 401 = 49724
Step 125: 49724 + 401 = 50125
Step 126: 50125 + 401 = 50526
Step 127: 50526 + 401 = 50927
Step 128: 50927 + 401 = 51328
Step 129: 51328 + 401 = 51729
Step 130: 51729 + 401 = 52130
Step 131: 52130 + 401 = 52531
Step 132: 52531 + 401 = 52932
Step 133: 52932 + 401 = 53333
Step 134: 53333 + 401 = 53734
Step 135: 53734 + 401 = 54135
Step 136: 54135 + 401 = 54536

So, 401*136 = 54536