Let's roll up our sleeves and solve this. We have 726 and we're going to multiply it by 5, essentially adding 726 to itself 5 times.
Step 1: 0 + 726 = 726
Step 2: 726 + 726 = 1452
Step 3: 1452 + 726 = 2178
Step 4: 2178 + 726 = 2904
Step 5: 2904 + 726 = 3630

So, 726*5 = 3630