Let's get this math done. We have 679 and we're going to multiply it by 172. This is the same as taking 679 and adding it to itself 172 times.
Step 1: 0 + 679 = 679
Step 2: 679 + 679 = 1358
Step 3: 1358 + 679 = 2037
Step 4: 2037 + 679 = 2716
Step 5: 2716 + 679 = 3395
Step 6: 3395 + 679 = 4074
Step 7: 4074 + 679 = 4753
Step 8: 4753 + 679 = 5432
Step 9: 5432 + 679 = 6111
Step 10: 6111 + 679 = 6790
Step 11: 6790 + 679 = 7469
Step 12: 7469 + 679 = 8148
Step 13: 8148 + 679 = 8827
Step 14: 8827 + 679 = 9506
Step 15: 9506 + 679 = 10185
Step 16: 10185 + 679 = 10864
Step 17: 10864 + 679 = 11543
Step 18: 11543 + 679 = 12222
Step 19: 12222 + 679 = 12901
Step 20: 12901 + 679 = 13580
Step 21: 13580 + 679 = 14259
Step 22: 14259 + 679 = 14938
Step 23: 14938 + 679 = 15617
Step 24: 15617 + 679 = 16296
Step 25: 16296 + 679 = 16975
Step 26: 16975 + 679 = 17654
Step 27: 17654 + 679 = 18333
Step 28: 18333 + 679 = 19012
Step 29: 19012 + 679 = 19691
Step 30: 19691 + 679 = 20370
Step 31: 20370 + 679 = 21049
Step 32: 21049 + 679 = 21728
Step 33: 21728 + 679 = 22407
Step 34: 22407 + 679 = 23086
Step 35: 23086 + 679 = 23765
Step 36: 23765 + 679 = 24444
Step 37: 24444 + 679 = 25123
Step 38: 25123 + 679 = 25802
Step 39: 25802 + 679 = 26481
Step 40: 26481 + 679 = 27160
Step 41: 27160 + 679 = 27839
Step 42: 27839 + 679 = 28518
Step 43: 28518 + 679 = 29197
Step 44: 29197 + 679 = 29876
Step 45: 29876 + 679 = 30555
Step 46: 30555 + 679 = 31234
Step 47: 31234 + 679 = 31913
Step 48: 31913 + 679 = 32592
Step 49: 32592 + 679 = 33271
Step 50: 33271 + 679 = 33950
Step 51: 33950 + 679 = 34629
Step 52: 34629 + 679 = 35308
Step 53: 35308 + 679 = 35987
Step 54: 35987 + 679 = 36666
Step 55: 36666 + 679 = 37345
Step 56: 37345 + 679 = 38024
Step 57: 38024 + 679 = 38703
Step 58: 38703 + 679 = 39382
Step 59: 39382 + 679 = 40061
Step 60: 40061 + 679 = 40740
Step 61: 40740 + 679 = 41419
Step 62: 41419 + 679 = 42098
Step 63: 42098 + 679 = 42777
Step 64: 42777 + 679 = 43456
Step 65: 43456 + 679 = 44135
Step 66: 44135 + 679 = 44814
Step 67: 44814 + 679 = 45493
Step 68: 45493 + 679 = 46172
Step 69: 46172 + 679 = 46851
Step 70: 46851 + 679 = 47530
Step 71: 47530 + 679 = 48209
Step 72: 48209 + 679 = 48888
Step 73: 48888 + 679 = 49567
Step 74: 49567 + 679 = 50246
Step 75: 50246 + 679 = 50925
Step 76: 50925 + 679 = 51604
Step 77: 51604 + 679 = 52283
Step 78: 52283 + 679 = 52962
Step 79: 52962 + 679 = 53641
Step 80: 53641 + 679 = 54320
Step 81: 54320 + 679 = 54999
Step 82: 54999 + 679 = 55678
Step 83: 55678 + 679 = 56357
Step 84: 56357 + 679 = 57036
Step 85: 57036 + 679 = 57715
Step 86: 57715 + 679 = 58394
Step 87: 58394 + 679 = 59073
Step 88: 59073 + 679 = 59752
Step 89: 59752 + 679 = 60431
Step 90: 60431 + 679 = 61110
Step 91: 61110 + 679 = 61789
Step 92: 61789 + 679 = 62468
Step 93: 62468 + 679 = 63147
Step 94: 63147 + 679 = 63826
Step 95: 63826 + 679 = 64505
Step 96: 64505 + 679 = 65184
Step 97: 65184 + 679 = 65863
Step 98: 65863 + 679 = 66542
Step 99: 66542 + 679 = 67221
Step 100: 67221 + 679 = 67900
Step 101: 67900 + 679 = 68579
Step 102: 68579 + 679 = 69258
Step 103: 69258 + 679 = 69937
Step 104: 69937 + 679 = 70616
Step 105: 70616 + 679 = 71295
Step 106: 71295 + 679 = 71974
Step 107: 71974 + 679 = 72653
Step 108: 72653 + 679 = 73332
Step 109: 73332 + 679 = 74011
Step 110: 74011 + 679 = 74690
Step 111: 74690 + 679 = 75369
Step 112: 75369 + 679 = 76048
Step 113: 76048 + 679 = 76727
Step 114: 76727 + 679 = 77406
Step 115: 77406 + 679 = 78085
Step 116: 78085 + 679 = 78764
Step 117: 78764 + 679 = 79443
Step 118: 79443 + 679 = 80122
Step 119: 80122 + 679 = 80801
Step 120: 80801 + 679 = 81480
Step 121: 81480 + 679 = 82159
Step 122: 82159 + 679 = 82838
Step 123: 82838 + 679 = 83517
Step 124: 83517 + 679 = 84196
Step 125: 84196 + 679 = 84875
Step 126: 84875 + 679 = 85554
Step 127: 85554 + 679 = 86233
Step 128: 86233 + 679 = 86912
Step 129: 86912 + 679 = 87591
Step 130: 87591 + 679 = 88270
Step 131: 88270 + 679 = 88949
Step 132: 88949 + 679 = 89628
Step 133: 89628 + 679 = 90307
Step 134: 90307 + 679 = 90986
Step 135: 90986 + 679 = 91665
Step 136: 91665 + 679 = 92344
Step 137: 92344 + 679 = 93023
Step 138: 93023 + 679 = 93702
Step 139: 93702 + 679 = 94381
Step 140: 94381 + 679 = 95060
Step 141: 95060 + 679 = 95739
Step 142: 95739 + 679 = 96418
Step 143: 96418 + 679 = 97097
Step 144: 97097 + 679 = 97776
Step 145: 97776 + 679 = 98455
Step 146: 98455 + 679 = 99134
Step 147: 99134 + 679 = 99813
Step 148: 99813 + 679 = 100492
Step 149: 100492 + 679 = 101171
Step 150: 101171 + 679 = 101850
Step 151: 101850 + 679 = 102529
Step 152: 102529 + 679 = 103208
Step 153: 103208 + 679 = 103887
Step 154: 103887 + 679 = 104566
Step 155: 104566 + 679 = 105245
Step 156: 105245 + 679 = 105924
Step 157: 105924 + 679 = 106603
Step 158: 106603 + 679 = 107282
Step 159: 107282 + 679 = 107961
Step 160: 107961 + 679 = 108640
Step 161: 108640 + 679 = 109319
Step 162: 109319 + 679 = 109998
Step 163: 109998 + 679 = 110677
Step 164: 110677 + 679 = 111356
Step 165: 111356 + 679 = 112035
Step 166: 112035 + 679 = 112714
Step 167: 112714 + 679 = 113393
Step 168: 113393 + 679 = 114072
Step 169: 114072 + 679 = 114751
Step 170: 114751 + 679 = 115430
Step 171: 115430 + 679 = 116109
Step 172: 116109 + 679 = 116788

So, 679*172 = 116788