OK, let's crack this. We're given 410 and our task is to multiply it by 3. Essentially, we'll be adding 410 to itself 3 times.
Step 1: 0 + 410 = 410
Step 2: 410 + 410 = 820
Step 3: 820 + 410 = 1230

So, 410*3 = 1230