Let's get this math done. We have 633 and we're going to multiply it by 11. This is the same as taking 633 and adding it to itself 11 times.
Step 1: 0 + 633 = 633
Step 2: 633 + 633 = 1266
Step 3: 1266 + 633 = 1899
Step 4: 1899 + 633 = 2532
Step 5: 2532 + 633 = 3165
Step 6: 3165 + 633 = 3798
Step 7: 3798 + 633 = 4431
Step 8: 4431 + 633 = 5064
Step 9: 5064 + 633 = 5697
Step 10: 5697 + 633 = 6330
Step 11: 6330 + 633 = 6963

So, 633*11 = 6963