OK, let's work through this together. We're starting with 936 and we're going to multiply it by 33, which means we add 936 to itself 33 times.
Step 1: 0 + 936 = 936
Step 2: 936 + 936 = 1872
Step 3: 1872 + 936 = 2808
Step 4: 2808 + 936 = 3744
Step 5: 3744 + 936 = 4680
Step 6: 4680 + 936 = 5616
Step 7: 5616 + 936 = 6552
Step 8: 6552 + 936 = 7488
Step 9: 7488 + 936 = 8424
Step 10: 8424 + 936 = 9360
Step 11: 9360 + 936 = 10296
Step 12: 10296 + 936 = 11232
Step 13: 11232 + 936 = 12168
Step 14: 12168 + 936 = 13104
Step 15: 13104 + 936 = 14040
Step 16: 14040 + 936 = 14976
Step 17: 14976 + 936 = 15912
Step 18: 15912 + 936 = 16848
Step 19: 16848 + 936 = 17784
Step 20: 17784 + 936 = 18720
Step 21: 18720 + 936 = 19656
Step 22: 19656 + 936 = 20592
Step 23: 20592 + 936 = 21528
Step 24: 21528 + 936 = 22464
Step 25: 22464 + 936 = 23400
Step 26: 23400 + 936 = 24336
Step 27: 24336 + 936 = 25272
Step 28: 25272 + 936 = 26208
Step 29: 26208 + 936 = 27144
Step 30: 27144 + 936 = 28080
Step 31: 28080 + 936 = 29016
Step 32: 29016 + 936 = 29952
Step 33: 29952 + 936 = 30888

So, 936*33 = 30888