Without delay, let's solve this. We've got 891 and we will be multiplying it by 3, that is, adding 891 to itself 3 times.
Step 1: 0 + 891 = 891
Step 2: 891 + 891 = 1782
Step 3: 1782 + 891 = 2673

So, 891*3 = 2673