It depends what u have been told to use as pi
the formula is
A=r2pi
Area of a circle equals radius squared time pi
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A circle with a 14 inch diameter has an area of 153.9 sq inches.
Assuming that the 14 inch box is square, you could fit a circle inside with a 14 inch diameter.
The area of a 14-inch circle is: 153.9 square inches.
The diameter of the circle is 14 units
The surface area of a sphere with a diameter of 14 inches is about 615.8 square inches.