The height and base radius of a cone are equal to the side lengths of a cube. Given that the volume of the cube is 9 cubic decimeters, what is the volume of the cone?
某圆锥体的高和底面半径都等于一个正方体的棱长．已知正方体的体积是9立方分米，圆锥的体积是多少分米？
<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<gadget id="calculator">3.14 * 3</gadget>
<output>9.42</output>

<result>9.42</result>