Without delay, let's solve this. We've got 786 and we will be multiplying it by 4, that is, adding 786 to itself 4 times.
Step 1: 0 + 786 = 786
Step 2: 786 + 786 = 1572
Step 3: 1572 + 786 = 2358
Step 4: 2358 + 786 = 3144

So, 786*4 = 3144