Without delay, let's solve this. We've got 801 and we will be multiplying it by 5, that is, adding 801 to itself 5 times.
Step 1: 0 + 801 = 801
Step 2: 801 + 801 = 1602
Step 3: 1602 + 801 = 2403
Step 4: 2403 + 801 = 3204
Step 5: 3204 + 801 = 4005

So, 801*5 = 4005