First things first. Pie is a food item, generally with a more or less flaky crust (depending on the skill of the preparer) and, when used as a dessert item usually contains a fruit or other sweet filling, or when used as a entrée or side dish generally contains some sort of savory filling. pi is the thirteenth letter of the lower case Greek alphabet representing the mathmatical constant that is the ratio between the circumference and the diameter of a circle.
The surface area of a sphere is given by:
Set equal to your given surface area:
My calculator said it, I believe it, that settles it