Let's solve this addition problem. We have 8122 and 65, and we need to add them together.

Step 1: We'll start by adding the digits 2 & 5 in column 1 and get 7.

Step 2: We'll start by adding the digits 2 & 6 in column 2 and get 8.

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

Step 4: We'll start by adding the digits 8 & 0 in column 4 and get 8.

So, 8122 + 65 = 8187.

