Pizzas are circles, and the formula to find the area of a circle is r²π=a. The diamter split in half can easily show you the radius, so let's solve the first portion of this question. 14÷2=7 7²=49π≈ 153.94 Now, there are two large pizzas. We have to multiply by 2. 153.94×2= 307.88 So there's about 307.88² inches of pizza.