A cylinder and a cone have the same base and volume, the height of the cylinder is 3 decimeters, and the height of the cone is how many decimeters.
一个圆柱和一个圆锥等底等体积，圆柱的高是3分米，圆锥的高是多少分米．
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>