Let's roll up our sleeves and solve this. We have 486 and we're going to multiply it by 171, essentially adding 486 to itself 171 times.
Step 1: 0 + 486 = 486
Step 2: 486 + 486 = 972
Step 3: 972 + 486 = 1458
Step 4: 1458 + 486 = 1944
Step 5: 1944 + 486 = 2430
Step 6: 2430 + 486 = 2916
Step 7: 2916 + 486 = 3402
Step 8: 3402 + 486 = 3888
Step 9: 3888 + 486 = 4374
Step 10: 4374 + 486 = 4860
Step 11: 4860 + 486 = 5346
Step 12: 5346 + 486 = 5832
Step 13: 5832 + 486 = 6318
Step 14: 6318 + 486 = 6804
Step 15: 6804 + 486 = 7290
Step 16: 7290 + 486 = 7776
Step 17: 7776 + 486 = 8262
Step 18: 8262 + 486 = 8748
Step 19: 8748 + 486 = 9234
Step 20: 9234 + 486 = 9720
Step 21: 9720 + 486 = 10206
Step 22: 10206 + 486 = 10692
Step 23: 10692 + 486 = 11178
Step 24: 11178 + 486 = 11664
Step 25: 11664 + 486 = 12150
Step 26: 12150 + 486 = 12636
Step 27: 12636 + 486 = 13122
Step 28: 13122 + 486 = 13608
Step 29: 13608 + 486 = 14094
Step 30: 14094 + 486 = 14580
Step 31: 14580 + 486 = 15066
Step 32: 15066 + 486 = 15552
Step 33: 15552 + 486 = 16038
Step 34: 16038 + 486 = 16524
Step 35: 16524 + 486 = 17010
Step 36: 17010 + 486 = 17496
Step 37: 17496 + 486 = 17982
Step 38: 17982 + 486 = 18468
Step 39: 18468 + 486 = 18954
Step 40: 18954 + 486 = 19440
Step 41: 19440 + 486 = 19926
Step 42: 19926 + 486 = 20412
Step 43: 20412 + 486 = 20898
Step 44: 20898 + 486 = 21384
Step 45: 21384 + 486 = 21870
Step 46: 21870 + 486 = 22356
Step 47: 22356 + 486 = 22842
Step 48: 22842 + 486 = 23328
Step 49: 23328 + 486 = 23814
Step 50: 23814 + 486 = 24300
Step 51: 24300 + 486 = 24786
Step 52: 24786 + 486 = 25272
Step 53: 25272 + 486 = 25758
Step 54: 25758 + 486 = 26244
Step 55: 26244 + 486 = 26730
Step 56: 26730 + 486 = 27216
Step 57: 27216 + 486 = 27702
Step 58: 27702 + 486 = 28188
Step 59: 28188 + 486 = 28674
Step 60: 28674 + 486 = 29160
Step 61: 29160 + 486 = 29646
Step 62: 29646 + 486 = 30132
Step 63: 30132 + 486 = 30618
Step 64: 30618 + 486 = 31104
Step 65: 31104 + 486 = 31590
Step 66: 31590 + 486 = 32076
Step 67: 32076 + 486 = 32562
Step 68: 32562 + 486 = 33048
Step 69: 33048 + 486 = 33534
Step 70: 33534 + 486 = 34020
Step 71: 34020 + 486 = 34506
Step 72: 34506 + 486 = 34992
Step 73: 34992 + 486 = 35478
Step 74: 35478 + 486 = 35964
Step 75: 35964 + 486 = 36450
Step 76: 36450 + 486 = 36936
Step 77: 36936 + 486 = 37422
Step 78: 37422 + 486 = 37908
Step 79: 37908 + 486 = 38394
Step 80: 38394 + 486 = 38880
Step 81: 38880 + 486 = 39366
Step 82: 39366 + 486 = 39852
Step 83: 39852 + 486 = 40338
Step 84: 40338 + 486 = 40824
Step 85: 40824 + 486 = 41310
Step 86: 41310 + 486 = 41796
Step 87: 41796 + 486 = 42282
Step 88: 42282 + 486 = 42768
Step 89: 42768 + 486 = 43254
Step 90: 43254 + 486 = 43740
Step 91: 43740 + 486 = 44226
Step 92: 44226 + 486 = 44712
Step 93: 44712 + 486 = 45198
Step 94: 45198 + 486 = 45684
Step 95: 45684 + 486 = 46170
Step 96: 46170 + 486 = 46656
Step 97: 46656 + 486 = 47142
Step 98: 47142 + 486 = 47628
Step 99: 47628 + 486 = 48114
Step 100: 48114 + 486 = 48600
Step 101: 48600 + 486 = 49086
Step 102: 49086 + 486 = 49572
Step 103: 49572 + 486 = 50058
Step 104: 50058 + 486 = 50544
Step 105: 50544 + 486 = 51030
Step 106: 51030 + 486 = 51516
Step 107: 51516 + 486 = 52002
Step 108: 52002 + 486 = 52488
Step 109: 52488 + 486 = 52974
Step 110: 52974 + 486 = 53460
Step 111: 53460 + 486 = 53946
Step 112: 53946 + 486 = 54432
Step 113: 54432 + 486 = 54918
Step 114: 54918 + 486 = 55404
Step 115: 55404 + 486 = 55890
Step 116: 55890 + 486 = 56376
Step 117: 56376 + 486 = 56862
Step 118: 56862 + 486 = 57348
Step 119: 57348 + 486 = 57834
Step 120: 57834 + 486 = 58320
Step 121: 58320 + 486 = 58806
Step 122: 58806 + 486 = 59292
Step 123: 59292 + 486 = 59778
Step 124: 59778 + 486 = 60264
Step 125: 60264 + 486 = 60750
Step 126: 60750 + 486 = 61236
Step 127: 61236 + 486 = 61722
Step 128: 61722 + 486 = 62208
Step 129: 62208 + 486 = 62694
Step 130: 62694 + 486 = 63180
Step 131: 63180 + 486 = 63666
Step 132: 63666 + 486 = 64152
Step 133: 64152 + 486 = 64638
Step 134: 64638 + 486 = 65124
Step 135: 65124 + 486 = 65610
Step 136: 65610 + 486 = 66096
Step 137: 66096 + 486 = 66582
Step 138: 66582 + 486 = 67068
Step 139: 67068 + 486 = 67554
Step 140: 67554 + 486 = 68040
Step 141: 68040 + 486 = 68526
Step 142: 68526 + 486 = 69012
Step 143: 69012 + 486 = 69498
Step 144: 69498 + 486 = 69984
Step 145: 69984 + 486 = 70470
Step 146: 70470 + 486 = 70956
Step 147: 70956 + 486 = 71442
Step 148: 71442 + 486 = 71928
Step 149: 71928 + 486 = 72414
Step 150: 72414 + 486 = 72900
Step 151: 72900 + 486 = 73386
Step 152: 73386 + 486 = 73872
Step 153: 73872 + 486 = 74358
Step 154: 74358 + 486 = 74844
Step 155: 74844 + 486 = 75330
Step 156: 75330 + 486 = 75816
Step 157: 75816 + 486 = 76302
Step 158: 76302 + 486 = 76788
Step 159: 76788 + 486 = 77274
Step 160: 77274 + 486 = 77760
Step 161: 77760 + 486 = 78246
Step 162: 78246 + 486 = 78732
Step 163: 78732 + 486 = 79218
Step 164: 79218 + 486 = 79704
Step 165: 79704 + 486 = 80190
Step 166: 80190 + 486 = 80676
Step 167: 80676 + 486 = 81162
Step 168: 81162 + 486 = 81648
Step 169: 81648 + 486 = 82134
Step 170: 82134 + 486 = 82620
Step 171: 82620 + 486 = 83106

So, 486*171 = 83106