A cylinder and a cone have the same base area. The height of the cone is three times the height of the cylinder. The volume of the cylinder is 8.1 cubic decimeters. What is the volume of the cone?
一个圆柱和一个圆锥，它们的底面积相等，圆锥的高是圆柱高的3倍，圆柱的体积是8.1立方分米，圆锥的体积是多少立方分米．
<result>8.1</result>