No problem, let's work through this together. We're starting with 4023 and 4040 and adding them all up.

Step 1: We'll start by adding the digits 3 & 0 in column 1 and get 3.

Step 2: We'll start by adding the digits 2 & 4 in column 2 and get 6.

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

Step 4: We'll start by adding the digits 4 & 4 in column 4 and get 8.

So, 4023 + 4040 = 8063.

