Here we go! We're going to add 66 and 5711 together.

Step 1: We'll start by adding the digits 6 & 1 in column 1 and get 7.

Step 2: We'll start by adding the digits 6 & 1 in column 2 and get 7.

Step 3: We'll start by adding the digits 0 & 7 in column 3 and get 7.

Step 4: We'll start by adding the digits 0 & 5 in column 4 and get 5.

So, 66 + 5711 = 5777.

