A cylinder and a cone have the same volume and the same base area. If the height of the cylinder is 3 cm, what is the volume of the cone in cm?
一个圆柱与一个圆锥的体积相等，底面积也相等，如果圆柱的高是3厘米，那么圆锥的体积是多少厘米．
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>