Let's get this math done. We have 11 and 304 and we're going to add them all together.

Step 1: We'll start by adding the digits 1 & 4 in column 1 and get 5.

Step 2: We'll start by adding the digits 1 & 0 in column 2 and get 1.

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

So, 11 + 304 = 315.

