1 3 x 3.14 x 15 x 15 July 8, 2019 16 32 64 128 1 3 x 3.14 x 15 x 15 x 20 1 3 x 3.14 x 15 x 15 x 19 1 3 x 3.14 x 15 2 x 15 1 3 x 3.14 x 15 x 15 x 16 15 x 3.14 15 รท3