Let's roll up our sleeves and solve this. We have 330 and we're going to multiply it by 12, essentially adding 330 to itself 12 times.
Step 1: 0 + 330 = 330
Step 2: 330 + 330 = 660
Step 3: 660 + 330 = 990
Step 4: 990 + 330 = 1320
Step 5: 1320 + 330 = 1650
Step 6: 1650 + 330 = 1980
Step 7: 1980 + 330 = 2310
Step 8: 2310 + 330 = 2640
Step 9: 2640 + 330 = 2970
Step 10: 2970 + 330 = 3300
Step 11: 3300 + 330 = 3630
Step 12: 3630 + 330 = 3960

So, 330*12 = 3960