A cylinder and a cone have the same volume and base area respectively. It is known that the height of the cylinder is 4dm, what is the height of the cone?
一个圆柱与一个圆椎的体积和底面积分别相等．已知圆柱的高是4dm，圆锥的高是多少？
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<result>12</result>