A cylinder and a cone have the same volume and base area respectively, the height of the cylinder is 6 cm, and the height of the cone is how many centimeters.
一个圆柱与一个圆锥的体积和底面积分别相等，已知圆柱的高是6厘米，圆锥的高是多少厘米．
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>