A cone and a cylinder have the same base and height, and the volume of the cone is 20 cubic decimeters smaller than that of the cylinder. What is the volume of the cone?
一个圆锥体和一个圆柱体等底等高，圆锥体体积比圆柱体小20立方分米，圆锥体的体积是多少立方分米．
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<result>10</result>