A cylinder and a cone have the same base area and volume. The height of the cylinder is 9 cm. What is the height of the cone in cm?
一个圆柱和一个圆锥的底面积相等，体积也相等，圆柱的高是9cm，圆锥的高是多少cm．
<gadget id="calculator">9 * 3</gadget>
<output>27</output>

<result>27</result>