OK, let's work through this together. We're starting with 966 and we're going to multiply it by 66, which means we add 966 to itself 66 times.
Step 1: 0 + 966 = 966
Step 2: 966 + 966 = 1932
Step 3: 1932 + 966 = 2898
Step 4: 2898 + 966 = 3864
Step 5: 3864 + 966 = 4830
Step 6: 4830 + 966 = 5796
Step 7: 5796 + 966 = 6762
Step 8: 6762 + 966 = 7728
Step 9: 7728 + 966 = 8694
Step 10: 8694 + 966 = 9660
Step 11: 9660 + 966 = 10626
Step 12: 10626 + 966 = 11592
Step 13: 11592 + 966 = 12558
Step 14: 12558 + 966 = 13524
Step 15: 13524 + 966 = 14490
Step 16: 14490 + 966 = 15456
Step 17: 15456 + 966 = 16422
Step 18: 16422 + 966 = 17388
Step 19: 17388 + 966 = 18354
Step 20: 18354 + 966 = 19320
Step 21: 19320 + 966 = 20286
Step 22: 20286 + 966 = 21252
Step 23: 21252 + 966 = 22218
Step 24: 22218 + 966 = 23184
Step 25: 23184 + 966 = 24150
Step 26: 24150 + 966 = 25116
Step 27: 25116 + 966 = 26082
Step 28: 26082 + 966 = 27048
Step 29: 27048 + 966 = 28014
Step 30: 28014 + 966 = 28980
Step 31: 28980 + 966 = 29946
Step 32: 29946 + 966 = 30912
Step 33: 30912 + 966 = 31878
Step 34: 31878 + 966 = 32844
Step 35: 32844 + 966 = 33810
Step 36: 33810 + 966 = 34776
Step 37: 34776 + 966 = 35742
Step 38: 35742 + 966 = 36708
Step 39: 36708 + 966 = 37674
Step 40: 37674 + 966 = 38640
Step 41: 38640 + 966 = 39606
Step 42: 39606 + 966 = 40572
Step 43: 40572 + 966 = 41538
Step 44: 41538 + 966 = 42504
Step 45: 42504 + 966 = 43470
Step 46: 43470 + 966 = 44436
Step 47: 44436 + 966 = 45402
Step 48: 45402 + 966 = 46368
Step 49: 46368 + 966 = 47334
Step 50: 47334 + 966 = 48300
Step 51: 48300 + 966 = 49266
Step 52: 49266 + 966 = 50232
Step 53: 50232 + 966 = 51198
Step 54: 51198 + 966 = 52164
Step 55: 52164 + 966 = 53130
Step 56: 53130 + 966 = 54096
Step 57: 54096 + 966 = 55062
Step 58: 55062 + 966 = 56028
Step 59: 56028 + 966 = 56994
Step 60: 56994 + 966 = 57960
Step 61: 57960 + 966 = 58926
Step 62: 58926 + 966 = 59892
Step 63: 59892 + 966 = 60858
Step 64: 60858 + 966 = 61824
Step 65: 61824 + 966 = 62790
Step 66: 62790 + 966 = 63756

So, 966*66 = 63756