Ready to do some math? We're starting with 104 and 800 and adding them up.

Step 1: We'll start by adding the digits 4 & 0 in column 1 and get 4.

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

Step 3: We'll start by adding the digits 1 & 8 in column 3 and get 9.

So, 104 + 800 = 904.

