Cut a cylinder into the largest cone, if the volume of the cone is 54 cubic centimeters, what is the volume cut off in cubic centimeters?
把一个圆柱削成一个最大的圆锥，如果圆锥的体积是54立方厘米，则削去的体积是多少立方厘米．
<gadget id="calculator">54 * 2</gadget>
<output>108</output>

<result>108</result>