OK, let's work through this together. We're starting with 233 and we're going to multiply it by 11, which means we add 233 to itself 11 times.
Step 1: 0 + 233 = 233
Step 2: 233 + 233 = 466
Step 3: 466 + 233 = 699
Step 4: 699 + 233 = 932
Step 5: 932 + 233 = 1165
Step 6: 1165 + 233 = 1398
Step 7: 1398 + 233 = 1631
Step 8: 1631 + 233 = 1864
Step 9: 1864 + 233 = 2097
Step 10: 2097 + 233 = 2330
Step 11: 2330 + 233 = 2563

So, 233*11 = 2563