Let's roll up our sleeves and solve this. We have 712 and we're going to multiply it by 136, essentially adding 712 to itself 136 times.
Step 1: 0 + 712 = 712
Step 2: 712 + 712 = 1424
Step 3: 1424 + 712 = 2136
Step 4: 2136 + 712 = 2848
Step 5: 2848 + 712 = 3560
Step 6: 3560 + 712 = 4272
Step 7: 4272 + 712 = 4984
Step 8: 4984 + 712 = 5696
Step 9: 5696 + 712 = 6408
Step 10: 6408 + 712 = 7120
Step 11: 7120 + 712 = 7832
Step 12: 7832 + 712 = 8544
Step 13: 8544 + 712 = 9256
Step 14: 9256 + 712 = 9968
Step 15: 9968 + 712 = 10680
Step 16: 10680 + 712 = 11392
Step 17: 11392 + 712 = 12104
Step 18: 12104 + 712 = 12816
Step 19: 12816 + 712 = 13528
Step 20: 13528 + 712 = 14240
Step 21: 14240 + 712 = 14952
Step 22: 14952 + 712 = 15664
Step 23: 15664 + 712 = 16376
Step 24: 16376 + 712 = 17088
Step 25: 17088 + 712 = 17800
Step 26: 17800 + 712 = 18512
Step 27: 18512 + 712 = 19224
Step 28: 19224 + 712 = 19936
Step 29: 19936 + 712 = 20648
Step 30: 20648 + 712 = 21360
Step 31: 21360 + 712 = 22072
Step 32: 22072 + 712 = 22784
Step 33: 22784 + 712 = 23496
Step 34: 23496 + 712 = 24208
Step 35: 24208 + 712 = 24920
Step 36: 24920 + 712 = 25632
Step 37: 25632 + 712 = 26344
Step 38: 26344 + 712 = 27056
Step 39: 27056 + 712 = 27768
Step 40: 27768 + 712 = 28480
Step 41: 28480 + 712 = 29192
Step 42: 29192 + 712 = 29904
Step 43: 29904 + 712 = 30616
Step 44: 30616 + 712 = 31328
Step 45: 31328 + 712 = 32040
Step 46: 32040 + 712 = 32752
Step 47: 32752 + 712 = 33464
Step 48: 33464 + 712 = 34176
Step 49: 34176 + 712 = 34888
Step 50: 34888 + 712 = 35600
Step 51: 35600 + 712 = 36312
Step 52: 36312 + 712 = 37024
Step 53: 37024 + 712 = 37736
Step 54: 37736 + 712 = 38448
Step 55: 38448 + 712 = 39160
Step 56: 39160 + 712 = 39872
Step 57: 39872 + 712 = 40584
Step 58: 40584 + 712 = 41296
Step 59: 41296 + 712 = 42008
Step 60: 42008 + 712 = 42720
Step 61: 42720 + 712 = 43432
Step 62: 43432 + 712 = 44144
Step 63: 44144 + 712 = 44856
Step 64: 44856 + 712 = 45568
Step 65: 45568 + 712 = 46280
Step 66: 46280 + 712 = 46992
Step 67: 46992 + 712 = 47704
Step 68: 47704 + 712 = 48416
Step 69: 48416 + 712 = 49128
Step 70: 49128 + 712 = 49840
Step 71: 49840 + 712 = 50552
Step 72: 50552 + 712 = 51264
Step 73: 51264 + 712 = 51976
Step 74: 51976 + 712 = 52688
Step 75: 52688 + 712 = 53400
Step 76: 53400 + 712 = 54112
Step 77: 54112 + 712 = 54824
Step 78: 54824 + 712 = 55536
Step 79: 55536 + 712 = 56248
Step 80: 56248 + 712 = 56960
Step 81: 56960 + 712 = 57672
Step 82: 57672 + 712 = 58384
Step 83: 58384 + 712 = 59096
Step 84: 59096 + 712 = 59808
Step 85: 59808 + 712 = 60520
Step 86: 60520 + 712 = 61232
Step 87: 61232 + 712 = 61944
Step 88: 61944 + 712 = 62656
Step 89: 62656 + 712 = 63368
Step 90: 63368 + 712 = 64080
Step 91: 64080 + 712 = 64792
Step 92: 64792 + 712 = 65504
Step 93: 65504 + 712 = 66216
Step 94: 66216 + 712 = 66928
Step 95: 66928 + 712 = 67640
Step 96: 67640 + 712 = 68352
Step 97: 68352 + 712 = 69064
Step 98: 69064 + 712 = 69776
Step 99: 69776 + 712 = 70488
Step 100: 70488 + 712 = 71200
Step 101: 71200 + 712 = 71912
Step 102: 71912 + 712 = 72624
Step 103: 72624 + 712 = 73336
Step 104: 73336 + 712 = 74048
Step 105: 74048 + 712 = 74760
Step 106: 74760 + 712 = 75472
Step 107: 75472 + 712 = 76184
Step 108: 76184 + 712 = 76896
Step 109: 76896 + 712 = 77608
Step 110: 77608 + 712 = 78320
Step 111: 78320 + 712 = 79032
Step 112: 79032 + 712 = 79744
Step 113: 79744 + 712 = 80456
Step 114: 80456 + 712 = 81168
Step 115: 81168 + 712 = 81880
Step 116: 81880 + 712 = 82592
Step 117: 82592 + 712 = 83304
Step 118: 83304 + 712 = 84016
Step 119: 84016 + 712 = 84728
Step 120: 84728 + 712 = 85440
Step 121: 85440 + 712 = 86152
Step 122: 86152 + 712 = 86864
Step 123: 86864 + 712 = 87576
Step 124: 87576 + 712 = 88288
Step 125: 88288 + 712 = 89000
Step 126: 89000 + 712 = 89712
Step 127: 89712 + 712 = 90424
Step 128: 90424 + 712 = 91136
Step 129: 91136 + 712 = 91848
Step 130: 91848 + 712 = 92560
Step 131: 92560 + 712 = 93272
Step 132: 93272 + 712 = 93984
Step 133: 93984 + 712 = 94696
Step 134: 94696 + 712 = 95408
Step 135: 95408 + 712 = 96120
Step 136: 96120 + 712 = 96832

So, 712*136 = 96832