cylindrical wooden block, after cutting 18m**3, obtains a largest cone, what is the volume of the cone?
一个圆柱体木块，削去18m**3后，得到一个最大的圆锥体，圆锥体积是多少．
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<result>9</result>