Sho Minamoto: "Pop Quiz!!!, What is the Area of the front of my Mega Phone which is Radius=16(10625/17)mm and use Pi=3.141592653". Note: My Mega Phone is a Perfect Circle
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The area of a circle is given by A = π r 2 . So
A = 3 . 1 4 1 5 9 2 6 5 3 [ 1 6 ( 7 1 0 6 2 5 ) ] 2 = 3 1 4 1 5 9 2 6 5 . 3