A cylinder and a cone have the same base and height, and the sum of their volumes is 24 cubic decimeters, what is the difference between their volumes in cubic decimeters?
一个圆柱和一个圆锥等底等高，它们的体积之和是24立方分米，那么它们的体积之差是多少立方分米．
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">24 / 4</gadget>
<output>6</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">18 - 6</gadget>
<output>12</output>

<result>12</result>