Without delay, let's solve this. We've got 847 and we will be multiplying it by 4, that is, adding 847 to itself 4 times.
Step 1: 0 + 847 = 847
Step 2: 847 + 847 = 1694
Step 3: 1694 + 847 = 2541
Step 4: 2541 + 847 = 3388

So, 847*4 = 3388