A cone and a cylinder have the same base and height, and the sum of their volumes is 36 cubic decimeters. How much cubic decimeters is the volume of the cylinder larger than the cone?
一个圆锥和一个圆柱等底等高，它们体积之和是36立方分米，圆柱体积比圆锥大多少立方分米．
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

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

<gadget id="calculator">9 * 2</gadget>
<output>18</output>

<result>18</result>