If 6 cubic decimeters are cut off from a cylinder, it is exactly a cone. What is the volume of the cylinder?
把一个圆柱体削去6立方分米，正好是个圆锥，圆柱的体积是多少．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>