A cylinder and a cone have the same volume and height. The base area of the cylinder is 18 square decimeters. What is the base area of the cone?
一个圆柱和一个圆锥体积相等，高也相等，圆柱的底面积是18平方分米，圆锥的底面积是多少平方分米．
<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<result>54</result>