Let's get this math done. We have 166 and we're going to multiply it by 5. This is the same as taking 166 and adding it to itself 5 times.
Step 1: 0 + 166 = 166
Step 2: 166 + 166 = 332
Step 3: 332 + 166 = 498
Step 4: 498 + 166 = 664
Step 5: 664 + 166 = 830

So, 166*5 = 830