Deficit. 12 inch pizza has a diameter of 12, so the radius is 6. According to the calculation formula of circular area, its area is 3.14× 6× 6 =113.04. A 6-inch pizza has a diameter of 6, so its radius is 3. According to the calculation formula of circular area, its area is 3. 14×3×3=28.26. /kloc-the area of 0/2 inch pizza is four times that of 6 inch pizza, so it is a loss. 1 12 inch pizza can be exchanged for 4 6 inch pizzas.