A cylinder and a cone have the same base area and volume. The height of the cylinder is 3 decimeters. What is the height of the cone?
一个圆柱体和一个圆锥体的底面积和体积都相等，圆柱体高3分米，圆锥体的高是多少分米．
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>