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At the Earth's surface, the acceleration due to gravity is 9.8 m/s2.
Lets pretend that the Earth is a perfect sphere. Surface area of a sphere = 4(pi)(radius)^2. The radius of earth is 6378.1 km. Plug that into your equation and you'll get your answer.
The radius of the earth is 6400 km.The total surface area is 4*pi*radius square
3.14 is a constant . It has no surface area. It is an approximation for pi = 3.141592.... 'pi' is the ratio between a circles circumference and its diameter. C = pi*d
The surface area pf the Earth is on a sphere, not a flat surface.