Let's get this math done. We have 86 and we're going to multiply it by 177. This is the same as taking 86 and adding it to itself 177 times.
Step 1: 0 + 86 = 86
Step 2: 86 + 86 = 172
Step 3: 172 + 86 = 258
Step 4: 258 + 86 = 344
Step 5: 344 + 86 = 430
Step 6: 430 + 86 = 516
Step 7: 516 + 86 = 602
Step 8: 602 + 86 = 688
Step 9: 688 + 86 = 774
Step 10: 774 + 86 = 860
Step 11: 860 + 86 = 946
Step 12: 946 + 86 = 1032
Step 13: 1032 + 86 = 1118
Step 14: 1118 + 86 = 1204
Step 15: 1204 + 86 = 1290
Step 16: 1290 + 86 = 1376
Step 17: 1376 + 86 = 1462
Step 18: 1462 + 86 = 1548
Step 19: 1548 + 86 = 1634
Step 20: 1634 + 86 = 1720
Step 21: 1720 + 86 = 1806
Step 22: 1806 + 86 = 1892
Step 23: 1892 + 86 = 1978
Step 24: 1978 + 86 = 2064
Step 25: 2064 + 86 = 2150
Step 26: 2150 + 86 = 2236
Step 27: 2236 + 86 = 2322
Step 28: 2322 + 86 = 2408
Step 29: 2408 + 86 = 2494
Step 30: 2494 + 86 = 2580
Step 31: 2580 + 86 = 2666
Step 32: 2666 + 86 = 2752
Step 33: 2752 + 86 = 2838
Step 34: 2838 + 86 = 2924
Step 35: 2924 + 86 = 3010
Step 36: 3010 + 86 = 3096
Step 37: 3096 + 86 = 3182
Step 38: 3182 + 86 = 3268
Step 39: 3268 + 86 = 3354
Step 40: 3354 + 86 = 3440
Step 41: 3440 + 86 = 3526
Step 42: 3526 + 86 = 3612
Step 43: 3612 + 86 = 3698
Step 44: 3698 + 86 = 3784
Step 45: 3784 + 86 = 3870
Step 46: 3870 + 86 = 3956
Step 47: 3956 + 86 = 4042
Step 48: 4042 + 86 = 4128
Step 49: 4128 + 86 = 4214
Step 50: 4214 + 86 = 4300
Step 51: 4300 + 86 = 4386
Step 52: 4386 + 86 = 4472
Step 53: 4472 + 86 = 4558
Step 54: 4558 + 86 = 4644
Step 55: 4644 + 86 = 4730
Step 56: 4730 + 86 = 4816
Step 57: 4816 + 86 = 4902
Step 58: 4902 + 86 = 4988
Step 59: 4988 + 86 = 5074
Step 60: 5074 + 86 = 5160
Step 61: 5160 + 86 = 5246
Step 62: 5246 + 86 = 5332
Step 63: 5332 + 86 = 5418
Step 64: 5418 + 86 = 5504
Step 65: 5504 + 86 = 5590
Step 66: 5590 + 86 = 5676
Step 67: 5676 + 86 = 5762
Step 68: 5762 + 86 = 5848
Step 69: 5848 + 86 = 5934
Step 70: 5934 + 86 = 6020
Step 71: 6020 + 86 = 6106
Step 72: 6106 + 86 = 6192
Step 73: 6192 + 86 = 6278
Step 74: 6278 + 86 = 6364
Step 75: 6364 + 86 = 6450
Step 76: 6450 + 86 = 6536
Step 77: 6536 + 86 = 6622
Step 78: 6622 + 86 = 6708
Step 79: 6708 + 86 = 6794
Step 80: 6794 + 86 = 6880
Step 81: 6880 + 86 = 6966
Step 82: 6966 + 86 = 7052
Step 83: 7052 + 86 = 7138
Step 84: 7138 + 86 = 7224
Step 85: 7224 + 86 = 7310
Step 86: 7310 + 86 = 7396
Step 87: 7396 + 86 = 7482
Step 88: 7482 + 86 = 7568
Step 89: 7568 + 86 = 7654
Step 90: 7654 + 86 = 7740
Step 91: 7740 + 86 = 7826
Step 92: 7826 + 86 = 7912
Step 93: 7912 + 86 = 7998
Step 94: 7998 + 86 = 8084
Step 95: 8084 + 86 = 8170
Step 96: 8170 + 86 = 8256
Step 97: 8256 + 86 = 8342
Step 98: 8342 + 86 = 8428
Step 99: 8428 + 86 = 8514
Step 100: 8514 + 86 = 8600
Step 101: 8600 + 86 = 8686
Step 102: 8686 + 86 = 8772
Step 103: 8772 + 86 = 8858
Step 104: 8858 + 86 = 8944
Step 105: 8944 + 86 = 9030
Step 106: 9030 + 86 = 9116
Step 107: 9116 + 86 = 9202
Step 108: 9202 + 86 = 9288
Step 109: 9288 + 86 = 9374
Step 110: 9374 + 86 = 9460
Step 111: 9460 + 86 = 9546
Step 112: 9546 + 86 = 9632
Step 113: 9632 + 86 = 9718
Step 114: 9718 + 86 = 9804
Step 115: 9804 + 86 = 9890
Step 116: 9890 + 86 = 9976
Step 117: 9976 + 86 = 10062
Step 118: 10062 + 86 = 10148
Step 119: 10148 + 86 = 10234
Step 120: 10234 + 86 = 10320
Step 121: 10320 + 86 = 10406
Step 122: 10406 + 86 = 10492
Step 123: 10492 + 86 = 10578
Step 124: 10578 + 86 = 10664
Step 125: 10664 + 86 = 10750
Step 126: 10750 + 86 = 10836
Step 127: 10836 + 86 = 10922
Step 128: 10922 + 86 = 11008
Step 129: 11008 + 86 = 11094
Step 130: 11094 + 86 = 11180
Step 131: 11180 + 86 = 11266
Step 132: 11266 + 86 = 11352
Step 133: 11352 + 86 = 11438
Step 134: 11438 + 86 = 11524
Step 135: 11524 + 86 = 11610
Step 136: 11610 + 86 = 11696
Step 137: 11696 + 86 = 11782
Step 138: 11782 + 86 = 11868
Step 139: 11868 + 86 = 11954
Step 140: 11954 + 86 = 12040
Step 141: 12040 + 86 = 12126
Step 142: 12126 + 86 = 12212
Step 143: 12212 + 86 = 12298
Step 144: 12298 + 86 = 12384
Step 145: 12384 + 86 = 12470
Step 146: 12470 + 86 = 12556
Step 147: 12556 + 86 = 12642
Step 148: 12642 + 86 = 12728
Step 149: 12728 + 86 = 12814
Step 150: 12814 + 86 = 12900
Step 151: 12900 + 86 = 12986
Step 152: 12986 + 86 = 13072
Step 153: 13072 + 86 = 13158
Step 154: 13158 + 86 = 13244
Step 155: 13244 + 86 = 13330
Step 156: 13330 + 86 = 13416
Step 157: 13416 + 86 = 13502
Step 158: 13502 + 86 = 13588
Step 159: 13588 + 86 = 13674
Step 160: 13674 + 86 = 13760
Step 161: 13760 + 86 = 13846
Step 162: 13846 + 86 = 13932
Step 163: 13932 + 86 = 14018
Step 164: 14018 + 86 = 14104
Step 165: 14104 + 86 = 14190
Step 166: 14190 + 86 = 14276
Step 167: 14276 + 86 = 14362
Step 168: 14362 + 86 = 14448
Step 169: 14448 + 86 = 14534
Step 170: 14534 + 86 = 14620
Step 171: 14620 + 86 = 14706
Step 172: 14706 + 86 = 14792
Step 173: 14792 + 86 = 14878
Step 174: 14878 + 86 = 14964
Step 175: 14964 + 86 = 15050
Step 176: 15050 + 86 = 15136
Step 177: 15136 + 86 = 15222

So, 86*177 = 15222