If the difference between the volumes of two cylinders and cones with the same base and height is 6 cubic decimeters, what is the volume of the cone?
两个等底等高的圆柱体和圆锥体的体积相差6立方分米，圆锥的体积是多少立方分米．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<result>3</result>