4 3 x 3.14 x 10 2 July 8, 2019 16 32 64 128 1 3 x 3.14 x 4 2 x 10 3.14 x 0.3 x 10 − 3 2 / 4 4/3 x 3.14 x 4 x 4 x 4 4 x 3.14 3.14 x 2 x 10