A cylinder and a cone have the same base area and the same volume, if the height of the cylinder is 3 cm, what is the height of the cone in cm?
一个圆柱和圆锥底面积相等，体积也相等，如果圆柱的高是3厘米，那么圆锥的高是多少厘米．
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>