A cone has a base area of 12.56 square decimeters and a volume of 31.4 cubic decimeters. What is its height?
一个圆锥体，底面积是12.56平方分米，体积是31.4立方分米，它的高应是多少．
<gadget id="calculator">3 / 3.14</gadget>
<output>0.955414</output>

<gadget id="calculator">12.56 * 0.955414</gadget>
<output>12</output>

<result>12</result>