Let's roll up our sleeves and solve this. We have 768 and we're going to multiply it by 5, essentially adding 768 to itself 5 times.
Step 1: 0 + 768 = 768
Step 2: 768 + 768 = 1536
Step 3: 1536 + 768 = 2304
Step 4: 2304 + 768 = 3072
Step 5: 3072 + 768 = 3840

So, 768*5 = 3840