Without delay, let's solve this. We've got 543 and we will be multiplying it by 3, that is, adding 543 to itself 3 times.
Step 1: 0 + 543 = 543
Step 2: 543 + 543 = 1086
Step 3: 1086 + 543 = 1629

So, 543*3 = 1629