Okay, we are tasked with adding 3215 and 2071. Let's begin!

Step 1: We'll start by adding the digits 5 & 1 in column 1 and get 6.

Step 2: We'll start by adding the digits 1 & 7 in column 2 and get 8.

Step 3: We'll start by adding the digits 2 & 0 in column 3 and get 2.

Step 4: We'll start by adding the digits 3 & 2 in column 4 and get 5.

So, 3215 + 2071 = 5286.

