cone and a cylinder have the same volume and height. It is known that the base area of the cylinder is 9 square centimeters. What is the base area of the cone?
一个圆锥体与一个圆柱体的体积相等，高也相等，已知圆柱体的底面积是9平方厘米，圆锥体的底面积是多少．
<gadget id="calculator">9 * 3</gadget>
<output>27</output>

<result>27</result>