Without delay, let's solve this. We've got 845 and we will be multiplying it by 5, that is, adding 845 to itself 5 times.
Step 1: 0 + 845 = 845
Step 2: 845 + 845 = 1690
Step 3: 1690 + 845 = 2535
Step 4: 2535 + 845 = 3380
Step 5: 3380 + 845 = 4225

So, 845*5 = 4225