Without delay, let's solve this. We've got 306 and we will be multiplying it by 4, that is, adding 306 to itself 4 times.
Step 1: 0 + 306 = 306
Step 2: 306 + 306 = 612
Step 3: 612 + 306 = 918
Step 4: 918 + 306 = 1224

So, 306*4 = 1224