If the volume of a cone is 6 cubic decimeters, what is the volume of a cylinder with the same diameter and height as its base?
一个圆锥的体积是6立方分米，和它底面直径相等，高也相等的圆柱的体积是多少立方分米．
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>