A cylinder and a cone have the same base and height, the sum of their volumes is 40 cubic centimeters, what is the volume of the cone in cubic centimeters?
一个圆柱体和一个圆锥体等底等高，它们体积之和是40立方厘米，圆锥的体积是多少立方厘米？
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">40 / 4</gadget>
<output>10</output>

<result>10</result>