Let's get this math done. We have 912 and we're going to multiply it by 156. This is the same as taking 912 and adding it to itself 156 times.
Step 1: 0 + 912 = 912
Step 2: 912 + 912 = 1824
Step 3: 1824 + 912 = 2736
Step 4: 2736 + 912 = 3648
Step 5: 3648 + 912 = 4560
Step 6: 4560 + 912 = 5472
Step 7: 5472 + 912 = 6384
Step 8: 6384 + 912 = 7296
Step 9: 7296 + 912 = 8208
Step 10: 8208 + 912 = 9120
Step 11: 9120 + 912 = 10032
Step 12: 10032 + 912 = 10944
Step 13: 10944 + 912 = 11856
Step 14: 11856 + 912 = 12768
Step 15: 12768 + 912 = 13680
Step 16: 13680 + 912 = 14592
Step 17: 14592 + 912 = 15504
Step 18: 15504 + 912 = 16416
Step 19: 16416 + 912 = 17328
Step 20: 17328 + 912 = 18240
Step 21: 18240 + 912 = 19152
Step 22: 19152 + 912 = 20064
Step 23: 20064 + 912 = 20976
Step 24: 20976 + 912 = 21888
Step 25: 21888 + 912 = 22800
Step 26: 22800 + 912 = 23712
Step 27: 23712 + 912 = 24624
Step 28: 24624 + 912 = 25536
Step 29: 25536 + 912 = 26448
Step 30: 26448 + 912 = 27360
Step 31: 27360 + 912 = 28272
Step 32: 28272 + 912 = 29184
Step 33: 29184 + 912 = 30096
Step 34: 30096 + 912 = 31008
Step 35: 31008 + 912 = 31920
Step 36: 31920 + 912 = 32832
Step 37: 32832 + 912 = 33744
Step 38: 33744 + 912 = 34656
Step 39: 34656 + 912 = 35568
Step 40: 35568 + 912 = 36480
Step 41: 36480 + 912 = 37392
Step 42: 37392 + 912 = 38304
Step 43: 38304 + 912 = 39216
Step 44: 39216 + 912 = 40128
Step 45: 40128 + 912 = 41040
Step 46: 41040 + 912 = 41952
Step 47: 41952 + 912 = 42864
Step 48: 42864 + 912 = 43776
Step 49: 43776 + 912 = 44688
Step 50: 44688 + 912 = 45600
Step 51: 45600 + 912 = 46512
Step 52: 46512 + 912 = 47424
Step 53: 47424 + 912 = 48336
Step 54: 48336 + 912 = 49248
Step 55: 49248 + 912 = 50160
Step 56: 50160 + 912 = 51072
Step 57: 51072 + 912 = 51984
Step 58: 51984 + 912 = 52896
Step 59: 52896 + 912 = 53808
Step 60: 53808 + 912 = 54720
Step 61: 54720 + 912 = 55632
Step 62: 55632 + 912 = 56544
Step 63: 56544 + 912 = 57456
Step 64: 57456 + 912 = 58368
Step 65: 58368 + 912 = 59280
Step 66: 59280 + 912 = 60192
Step 67: 60192 + 912 = 61104
Step 68: 61104 + 912 = 62016
Step 69: 62016 + 912 = 62928
Step 70: 62928 + 912 = 63840
Step 71: 63840 + 912 = 64752
Step 72: 64752 + 912 = 65664
Step 73: 65664 + 912 = 66576
Step 74: 66576 + 912 = 67488
Step 75: 67488 + 912 = 68400
Step 76: 68400 + 912 = 69312
Step 77: 69312 + 912 = 70224
Step 78: 70224 + 912 = 71136
Step 79: 71136 + 912 = 72048
Step 80: 72048 + 912 = 72960
Step 81: 72960 + 912 = 73872
Step 82: 73872 + 912 = 74784
Step 83: 74784 + 912 = 75696
Step 84: 75696 + 912 = 76608
Step 85: 76608 + 912 = 77520
Step 86: 77520 + 912 = 78432
Step 87: 78432 + 912 = 79344
Step 88: 79344 + 912 = 80256
Step 89: 80256 + 912 = 81168
Step 90: 81168 + 912 = 82080
Step 91: 82080 + 912 = 82992
Step 92: 82992 + 912 = 83904
Step 93: 83904 + 912 = 84816
Step 94: 84816 + 912 = 85728
Step 95: 85728 + 912 = 86640
Step 96: 86640 + 912 = 87552
Step 97: 87552 + 912 = 88464
Step 98: 88464 + 912 = 89376
Step 99: 89376 + 912 = 90288
Step 100: 90288 + 912 = 91200
Step 101: 91200 + 912 = 92112
Step 102: 92112 + 912 = 93024
Step 103: 93024 + 912 = 93936
Step 104: 93936 + 912 = 94848
Step 105: 94848 + 912 = 95760
Step 106: 95760 + 912 = 96672
Step 107: 96672 + 912 = 97584
Step 108: 97584 + 912 = 98496
Step 109: 98496 + 912 = 99408
Step 110: 99408 + 912 = 100320
Step 111: 100320 + 912 = 101232
Step 112: 101232 + 912 = 102144
Step 113: 102144 + 912 = 103056
Step 114: 103056 + 912 = 103968
Step 115: 103968 + 912 = 104880
Step 116: 104880 + 912 = 105792
Step 117: 105792 + 912 = 106704
Step 118: 106704 + 912 = 107616
Step 119: 107616 + 912 = 108528
Step 120: 108528 + 912 = 109440
Step 121: 109440 + 912 = 110352
Step 122: 110352 + 912 = 111264
Step 123: 111264 + 912 = 112176
Step 124: 112176 + 912 = 113088
Step 125: 113088 + 912 = 114000
Step 126: 114000 + 912 = 114912
Step 127: 114912 + 912 = 115824
Step 128: 115824 + 912 = 116736
Step 129: 116736 + 912 = 117648
Step 130: 117648 + 912 = 118560
Step 131: 118560 + 912 = 119472
Step 132: 119472 + 912 = 120384
Step 133: 120384 + 912 = 121296
Step 134: 121296 + 912 = 122208
Step 135: 122208 + 912 = 123120
Step 136: 123120 + 912 = 124032
Step 137: 124032 + 912 = 124944
Step 138: 124944 + 912 = 125856
Step 139: 125856 + 912 = 126768
Step 140: 126768 + 912 = 127680
Step 141: 127680 + 912 = 128592
Step 142: 128592 + 912 = 129504
Step 143: 129504 + 912 = 130416
Step 144: 130416 + 912 = 131328
Step 145: 131328 + 912 = 132240
Step 146: 132240 + 912 = 133152
Step 147: 133152 + 912 = 134064
Step 148: 134064 + 912 = 134976
Step 149: 134976 + 912 = 135888
Step 150: 135888 + 912 = 136800
Step 151: 136800 + 912 = 137712
Step 152: 137712 + 912 = 138624
Step 153: 138624 + 912 = 139536
Step 154: 139536 + 912 = 140448
Step 155: 140448 + 912 = 141360
Step 156: 141360 + 912 = 142272

So, 912*156 = 142272