Let's roll up our sleeves and solve this. We have 947 and we're going to multiply it by 3, essentially adding 947 to itself 3 times.
Step 1: 0 + 947 = 947
Step 2: 947 + 947 = 1894
Step 3: 1894 + 947 = 2841

So, 947*3 = 2841