A cylinder and a cone have the same volume and height, the area of the base of the cylinder is 9 square centimeters, what is the area of the base of the cone in square centimeters?
一个圆柱与一个圆锥的体积与高都相等，圆柱的底面积是9平方厘米，圆锥的底面积是多少平方厘米．
<gadget id="calculator">9 * 3</gadget>
<output>27</output>

<result>27</result>