The volume of a cone is 12m**3, how much more cubic meters is the volume of a cylinder of the same height as it.
一个圆锥的体积12m**3，与它等低等高的圆柱的体积比它多多少立方米．
<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<result>24</result>