Let's get this math done. We have 679 and we're going to multiply it by 5. This is the same as taking 679 and adding it to itself 5 times.
Step 1: 0 + 679 = 679
Step 2: 679 + 679 = 1358
Step 3: 1358 + 679 = 2037
Step 4: 2037 + 679 = 2716
Step 5: 2716 + 679 = 3395

So, 679*5 = 3395