Let's roll up our sleeves and solve this. We have 799 and we're going to multiply it by 4, essentially adding 799 to itself 4 times.
Step 1: 0 + 799 = 799
Step 2: 799 + 799 = 1598
Step 3: 1598 + 799 = 2397
Step 4: 2397 + 799 = 3196

So, 799*4 = 3196