Sure thing! We've got 66 and we're gonna multiply it by 54. That's the same as adding 66 to itself 54 times.
Step 1: 0 + 66 = 66
Step 2: 66 + 66 = 132
Step 3: 132 + 66 = 198
Step 4: 198 + 66 = 264
Step 5: 264 + 66 = 330
Step 6: 330 + 66 = 396
Step 7: 396 + 66 = 462
Step 8: 462 + 66 = 528
Step 9: 528 + 66 = 594
Step 10: 594 + 66 = 660
Step 11: 660 + 66 = 726
Step 12: 726 + 66 = 792
Step 13: 792 + 66 = 858
Step 14: 858 + 66 = 924
Step 15: 924 + 66 = 990
Step 16: 990 + 66 = 1056
Step 17: 1056 + 66 = 1122
Step 18: 1122 + 66 = 1188
Step 19: 1188 + 66 = 1254
Step 20: 1254 + 66 = 1320
Step 21: 1320 + 66 = 1386
Step 22: 1386 + 66 = 1452
Step 23: 1452 + 66 = 1518
Step 24: 1518 + 66 = 1584
Step 25: 1584 + 66 = 1650
Step 26: 1650 + 66 = 1716
Step 27: 1716 + 66 = 1782
Step 28: 1782 + 66 = 1848
Step 29: 1848 + 66 = 1914
Step 30: 1914 + 66 = 1980
Step 31: 1980 + 66 = 2046
Step 32: 2046 + 66 = 2112
Step 33: 2112 + 66 = 2178
Step 34: 2178 + 66 = 2244
Step 35: 2244 + 66 = 2310
Step 36: 2310 + 66 = 2376
Step 37: 2376 + 66 = 2442
Step 38: 2442 + 66 = 2508
Step 39: 2508 + 66 = 2574
Step 40: 2574 + 66 = 2640
Step 41: 2640 + 66 = 2706
Step 42: 2706 + 66 = 2772
Step 43: 2772 + 66 = 2838
Step 44: 2838 + 66 = 2904
Step 45: 2904 + 66 = 2970
Step 46: 2970 + 66 = 3036
Step 47: 3036 + 66 = 3102
Step 48: 3102 + 66 = 3168
Step 49: 3168 + 66 = 3234
Step 50: 3234 + 66 = 3300
Step 51: 3300 + 66 = 3366
Step 52: 3366 + 66 = 3432
Step 53: 3432 + 66 = 3498
Step 54: 3498 + 66 = 3564

So, 66*54 = 3564