Cut a cylinder into the largest cone. The volume of the cut part is 30 cubic centimeters. What is the volume of the cone?
把一个圆柱削成一个最大的圆锥体，削去部分的体积是30立方厘米，这个圆锥的体积是多少．
<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<result>15</result>