Without delay, let's solve this. We've got 812 and we will be multiplying it by 5, that is, adding 812 to itself 5 times.
Step 1: 0 + 812 = 812
Step 2: 812 + 812 = 1624
Step 3: 1624 + 812 = 2436
Step 4: 2436 + 812 = 3248
Step 5: 3248 + 812 = 4060

So, 812*5 = 4060