Let's break this down. We're going to add 9094 and 404 together.

Step 1: We'll start by adding the digits 4 & 4 in column 1 and get 8.

Step 2: We'll start by adding the digits 9 & 0 in column 2 and get 9.

Step 3: We'll start by adding the digits 0 & 4 in column 3 and get 4.

Step 4: We'll start by adding the digits 9 & 0 in column 4 and get 9.

So, 9094 + 404 = 9498.

