OK, let's crack this. We're given 330 and our task is to multiply it by 4. Essentially, we'll be adding 330 to itself 4 times.
Step 1: 0 + 330 = 330
Step 2: 330 + 330 = 660
Step 3: 660 + 330 = 990
Step 4: 990 + 330 = 1320

So, 330*4 = 1320