Sure thing! We've got 172 and we're gonna multiply it by 100. That's the same as adding 172 to itself 100 times.
Step 1: 0 + 172 = 172
Step 2: 172 + 172 = 344
Step 3: 344 + 172 = 516
Step 4: 516 + 172 = 688
Step 5: 688 + 172 = 860
Step 6: 860 + 172 = 1032
Step 7: 1032 + 172 = 1204
Step 8: 1204 + 172 = 1376
Step 9: 1376 + 172 = 1548
Step 10: 1548 + 172 = 1720
Step 11: 1720 + 172 = 1892
Step 12: 1892 + 172 = 2064
Step 13: 2064 + 172 = 2236
Step 14: 2236 + 172 = 2408
Step 15: 2408 + 172 = 2580
Step 16: 2580 + 172 = 2752
Step 17: 2752 + 172 = 2924
Step 18: 2924 + 172 = 3096
Step 19: 3096 + 172 = 3268
Step 20: 3268 + 172 = 3440
Step 21: 3440 + 172 = 3612
Step 22: 3612 + 172 = 3784
Step 23: 3784 + 172 = 3956
Step 24: 3956 + 172 = 4128
Step 25: 4128 + 172 = 4300
Step 26: 4300 + 172 = 4472
Step 27: 4472 + 172 = 4644
Step 28: 4644 + 172 = 4816
Step 29: 4816 + 172 = 4988
Step 30: 4988 + 172 = 5160
Step 31: 5160 + 172 = 5332
Step 32: 5332 + 172 = 5504
Step 33: 5504 + 172 = 5676
Step 34: 5676 + 172 = 5848
Step 35: 5848 + 172 = 6020
Step 36: 6020 + 172 = 6192
Step 37: 6192 + 172 = 6364
Step 38: 6364 + 172 = 6536
Step 39: 6536 + 172 = 6708
Step 40: 6708 + 172 = 6880
Step 41: 6880 + 172 = 7052
Step 42: 7052 + 172 = 7224
Step 43: 7224 + 172 = 7396
Step 44: 7396 + 172 = 7568
Step 45: 7568 + 172 = 7740
Step 46: 7740 + 172 = 7912
Step 47: 7912 + 172 = 8084
Step 48: 8084 + 172 = 8256
Step 49: 8256 + 172 = 8428
Step 50: 8428 + 172 = 8600
Step 51: 8600 + 172 = 8772
Step 52: 8772 + 172 = 8944
Step 53: 8944 + 172 = 9116
Step 54: 9116 + 172 = 9288
Step 55: 9288 + 172 = 9460
Step 56: 9460 + 172 = 9632
Step 57: 9632 + 172 = 9804
Step 58: 9804 + 172 = 9976
Step 59: 9976 + 172 = 10148
Step 60: 10148 + 172 = 10320
Step 61: 10320 + 172 = 10492
Step 62: 10492 + 172 = 10664
Step 63: 10664 + 172 = 10836
Step 64: 10836 + 172 = 11008
Step 65: 11008 + 172 = 11180
Step 66: 11180 + 172 = 11352
Step 67: 11352 + 172 = 11524
Step 68: 11524 + 172 = 11696
Step 69: 11696 + 172 = 11868
Step 70: 11868 + 172 = 12040
Step 71: 12040 + 172 = 12212
Step 72: 12212 + 172 = 12384
Step 73: 12384 + 172 = 12556
Step 74: 12556 + 172 = 12728
Step 75: 12728 + 172 = 12900
Step 76: 12900 + 172 = 13072
Step 77: 13072 + 172 = 13244
Step 78: 13244 + 172 = 13416
Step 79: 13416 + 172 = 13588
Step 80: 13588 + 172 = 13760
Step 81: 13760 + 172 = 13932
Step 82: 13932 + 172 = 14104
Step 83: 14104 + 172 = 14276
Step 84: 14276 + 172 = 14448
Step 85: 14448 + 172 = 14620
Step 86: 14620 + 172 = 14792
Step 87: 14792 + 172 = 14964
Step 88: 14964 + 172 = 15136
Step 89: 15136 + 172 = 15308
Step 90: 15308 + 172 = 15480
Step 91: 15480 + 172 = 15652
Step 92: 15652 + 172 = 15824
Step 93: 15824 + 172 = 15996
Step 94: 15996 + 172 = 16168
Step 95: 16168 + 172 = 16340
Step 96: 16340 + 172 = 16512
Step 97: 16512 + 172 = 16684
Step 98: 16684 + 172 = 16856
Step 99: 16856 + 172 = 17028
Step 100: 17028 + 172 = 17200

So, 172*100 = 17200