The sum of the volumes of a cylinder and a cone with the same base and height is 36 cubic decimeters. What is the volume of the cone?
等底等高的圆柱和圆锥体积的和是36立方分米，这个圆锥的体积是多少立方分米．
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">36 / 4</gadget>
<output>9</output>

<result>9</result>