Let's get this math done. We have 841 and we're going to multiply it by 5. This is the same as taking 841 and adding it to itself 5 times.
Step 1: 0 + 841 = 841
Step 2: 841 + 841 = 1682
Step 3: 1682 + 841 = 2523
Step 4: 2523 + 841 = 3364
Step 5: 3364 + 841 = 4205

So, 841*5 = 4205