Without delay, let's solve this. We've got 604 and we will be multiplying it by 3, that is, adding 604 to itself 3 times.
Step 1: 0 + 604 = 604
Step 2: 604 + 604 = 1208
Step 3: 1208 + 604 = 1812

So, 604*3 = 1812