Let's roll up our sleeves and solve this. We have 68 and we're going to multiply it by 171, essentially adding 68 to itself 171 times.
Step 1: 0 + 68 = 68
Step 2: 68 + 68 = 136
Step 3: 136 + 68 = 204
Step 4: 204 + 68 = 272
Step 5: 272 + 68 = 340
Step 6: 340 + 68 = 408
Step 7: 408 + 68 = 476
Step 8: 476 + 68 = 544
Step 9: 544 + 68 = 612
Step 10: 612 + 68 = 680
Step 11: 680 + 68 = 748
Step 12: 748 + 68 = 816
Step 13: 816 + 68 = 884
Step 14: 884 + 68 = 952
Step 15: 952 + 68 = 1020
Step 16: 1020 + 68 = 1088
Step 17: 1088 + 68 = 1156
Step 18: 1156 + 68 = 1224
Step 19: 1224 + 68 = 1292
Step 20: 1292 + 68 = 1360
Step 21: 1360 + 68 = 1428
Step 22: 1428 + 68 = 1496
Step 23: 1496 + 68 = 1564
Step 24: 1564 + 68 = 1632
Step 25: 1632 + 68 = 1700
Step 26: 1700 + 68 = 1768
Step 27: 1768 + 68 = 1836
Step 28: 1836 + 68 = 1904
Step 29: 1904 + 68 = 1972
Step 30: 1972 + 68 = 2040
Step 31: 2040 + 68 = 2108
Step 32: 2108 + 68 = 2176
Step 33: 2176 + 68 = 2244
Step 34: 2244 + 68 = 2312
Step 35: 2312 + 68 = 2380
Step 36: 2380 + 68 = 2448
Step 37: 2448 + 68 = 2516
Step 38: 2516 + 68 = 2584
Step 39: 2584 + 68 = 2652
Step 40: 2652 + 68 = 2720
Step 41: 2720 + 68 = 2788
Step 42: 2788 + 68 = 2856
Step 43: 2856 + 68 = 2924
Step 44: 2924 + 68 = 2992
Step 45: 2992 + 68 = 3060
Step 46: 3060 + 68 = 3128
Step 47: 3128 + 68 = 3196
Step 48: 3196 + 68 = 3264
Step 49: 3264 + 68 = 3332
Step 50: 3332 + 68 = 3400
Step 51: 3400 + 68 = 3468
Step 52: 3468 + 68 = 3536
Step 53: 3536 + 68 = 3604
Step 54: 3604 + 68 = 3672
Step 55: 3672 + 68 = 3740
Step 56: 3740 + 68 = 3808
Step 57: 3808 + 68 = 3876
Step 58: 3876 + 68 = 3944
Step 59: 3944 + 68 = 4012
Step 60: 4012 + 68 = 4080
Step 61: 4080 + 68 = 4148
Step 62: 4148 + 68 = 4216
Step 63: 4216 + 68 = 4284
Step 64: 4284 + 68 = 4352
Step 65: 4352 + 68 = 4420
Step 66: 4420 + 68 = 4488
Step 67: 4488 + 68 = 4556
Step 68: 4556 + 68 = 4624
Step 69: 4624 + 68 = 4692
Step 70: 4692 + 68 = 4760
Step 71: 4760 + 68 = 4828
Step 72: 4828 + 68 = 4896
Step 73: 4896 + 68 = 4964
Step 74: 4964 + 68 = 5032
Step 75: 5032 + 68 = 5100
Step 76: 5100 + 68 = 5168
Step 77: 5168 + 68 = 5236
Step 78: 5236 + 68 = 5304
Step 79: 5304 + 68 = 5372
Step 80: 5372 + 68 = 5440
Step 81: 5440 + 68 = 5508
Step 82: 5508 + 68 = 5576
Step 83: 5576 + 68 = 5644
Step 84: 5644 + 68 = 5712
Step 85: 5712 + 68 = 5780
Step 86: 5780 + 68 = 5848
Step 87: 5848 + 68 = 5916
Step 88: 5916 + 68 = 5984
Step 89: 5984 + 68 = 6052
Step 90: 6052 + 68 = 6120
Step 91: 6120 + 68 = 6188
Step 92: 6188 + 68 = 6256
Step 93: 6256 + 68 = 6324
Step 94: 6324 + 68 = 6392
Step 95: 6392 + 68 = 6460
Step 96: 6460 + 68 = 6528
Step 97: 6528 + 68 = 6596
Step 98: 6596 + 68 = 6664
Step 99: 6664 + 68 = 6732
Step 100: 6732 + 68 = 6800
Step 101: 6800 + 68 = 6868
Step 102: 6868 + 68 = 6936
Step 103: 6936 + 68 = 7004
Step 104: 7004 + 68 = 7072
Step 105: 7072 + 68 = 7140
Step 106: 7140 + 68 = 7208
Step 107: 7208 + 68 = 7276
Step 108: 7276 + 68 = 7344
Step 109: 7344 + 68 = 7412
Step 110: 7412 + 68 = 7480
Step 111: 7480 + 68 = 7548
Step 112: 7548 + 68 = 7616
Step 113: 7616 + 68 = 7684
Step 114: 7684 + 68 = 7752
Step 115: 7752 + 68 = 7820
Step 116: 7820 + 68 = 7888
Step 117: 7888 + 68 = 7956
Step 118: 7956 + 68 = 8024
Step 119: 8024 + 68 = 8092
Step 120: 8092 + 68 = 8160
Step 121: 8160 + 68 = 8228
Step 122: 8228 + 68 = 8296
Step 123: 8296 + 68 = 8364
Step 124: 8364 + 68 = 8432
Step 125: 8432 + 68 = 8500
Step 126: 8500 + 68 = 8568
Step 127: 8568 + 68 = 8636
Step 128: 8636 + 68 = 8704
Step 129: 8704 + 68 = 8772
Step 130: 8772 + 68 = 8840
Step 131: 8840 + 68 = 8908
Step 132: 8908 + 68 = 8976
Step 133: 8976 + 68 = 9044
Step 134: 9044 + 68 = 9112
Step 135: 9112 + 68 = 9180
Step 136: 9180 + 68 = 9248
Step 137: 9248 + 68 = 9316
Step 138: 9316 + 68 = 9384
Step 139: 9384 + 68 = 9452
Step 140: 9452 + 68 = 9520
Step 141: 9520 + 68 = 9588
Step 142: 9588 + 68 = 9656
Step 143: 9656 + 68 = 9724
Step 144: 9724 + 68 = 9792
Step 145: 9792 + 68 = 9860
Step 146: 9860 + 68 = 9928
Step 147: 9928 + 68 = 9996
Step 148: 9996 + 68 = 10064
Step 149: 10064 + 68 = 10132
Step 150: 10132 + 68 = 10200
Step 151: 10200 + 68 = 10268
Step 152: 10268 + 68 = 10336
Step 153: 10336 + 68 = 10404
Step 154: 10404 + 68 = 10472
Step 155: 10472 + 68 = 10540
Step 156: 10540 + 68 = 10608
Step 157: 10608 + 68 = 10676
Step 158: 10676 + 68 = 10744
Step 159: 10744 + 68 = 10812
Step 160: 10812 + 68 = 10880
Step 161: 10880 + 68 = 10948
Step 162: 10948 + 68 = 11016
Step 163: 11016 + 68 = 11084
Step 164: 11084 + 68 = 11152
Step 165: 11152 + 68 = 11220
Step 166: 11220 + 68 = 11288
Step 167: 11288 + 68 = 11356
Step 168: 11356 + 68 = 11424
Step 169: 11424 + 68 = 11492
Step 170: 11492 + 68 = 11560
Step 171: 11560 + 68 = 11628

So, 68*171 = 11628