It should be "pi", then the answer is
3.1415 x 8 x 3 = 75.396
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for the surface area:4 times pie times radius squared for volume:4/3 times pie times radius cubed
37.68 if you use 3.14 as pi
It is: 8/3 times 3 = 8
2.6667
It is: 3/8 times 1/3 = 1/8 in its lowest terms