A cylinder and a cone have the same volume and the same base area. It is known that the height of the cylinder is 9 cm. What is the height of the cone?
一个圆柱与一个圆锥的体积相等，底面积也相等，已知圆柱的高是9cm，那么圆锥的高是多少．
<gadget id="calculator">9 * 3</gadget>
<output>27</output>

<result>27</result>