OK, let's crack this. We're given 324 and our task is to multiply it by 5. Essentially, we'll be adding 324 to itself 5 times.
Step 1: 0 + 324 = 324
Step 2: 324 + 324 = 648
Step 3: 648 + 324 = 972
Step 4: 972 + 324 = 1296
Step 5: 1296 + 324 = 1620

So, 324*5 = 1620