Here is my response: Google it. Finding the surface area of the top is easy if it is flat. Then you need to find the area of the bottom, which conforms to the bottom of the pan. Then you need to calculate the truncated conical area of the 'side' of the pie.
I didn't calculate the volume, only the surface area for each section. You need only to add all of the surface areas to get the total area. PIES ARE NOT FLAT CIRCLES.