OK, let's crack this. We're given 416 and our task is to multiply it by 3. Essentially, we'll be adding 416 to itself 3 times.
Step 1: 0 + 416 = 416
Step 2: 416 + 416 = 832
Step 3: 832 + 416 = 1248

So, 416*3 = 1248