It is known that the volume and diameter of the base of the cylinder and the cone are equal, the height of the cone is 9 decimeters, how many decimeters is the height of the cylinder
已知圆柱和圆锥的体积和底面直径都相等，圆锥的高是9分米，圆柱的高是多少分米
<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<result>3</result>