OK, let's crack this. We're given 144 and our task is to multiply it by 5. Essentially, we'll be adding 144 to itself 5 times.
Step 1: 0 + 144 = 144
Step 2: 144 + 144 = 288
Step 3: 288 + 144 = 432
Step 4: 432 + 144 = 576
Step 5: 576 + 144 = 720

So, 144*5 = 720