A cylinder and a cone have the same volume and the same base area. It is known that the height of the cylinder is 6dm, and how many decimeters is the height of the cone.
一个圆柱和一个圆锥的体积相等，底面积也相等，已知圆柱的高是6dm，圆锥的高是多少分米．
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>