Without delay, let's solve this. We've got 340 and we will be multiplying it by 4, that is, adding 340 to itself 4 times.
Step 1: 0 + 340 = 340
Step 2: 340 + 340 = 680
Step 3: 680 + 340 = 1020
Step 4: 1020 + 340 = 1360

So, 340*4 = 1360