Let's get this math done. We have 142 and 7115 and we're going to add them all 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 4 & 1 in column 2 and get 5.

Step 3: We'll start by adding the digits 1 & 1 in column 3 and get 2.

Step 4: We'll start by adding the digits 0 & 7 in column 4 and get 7.

So, 142 + 7115 = 7257.

