OK, let's work through this together. We're starting with 33 and we're going to multiply it by 12, which means we add 33 to itself 12 times.
Step 1: 0 + 33 = 33
Step 2: 33 + 33 = 66
Step 3: 66 + 33 = 99
Step 4: 99 + 33 = 132
Step 5: 132 + 33 = 165
Step 6: 165 + 33 = 198
Step 7: 198 + 33 = 231
Step 8: 231 + 33 = 264
Step 9: 264 + 33 = 297
Step 10: 297 + 33 = 330
Step 11: 330 + 33 = 363
Step 12: 363 + 33 = 396

So, 33*12 = 396