A cylinder and a cone have the same base and height, the sum of their volumes is 60cm**2, what is the volume of the cone in cubic centimeters?
一个圆柱和一个圆锥等底等高，它们的体积总和是60cm**2，圆锥的体积是多少立方厘米？
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">60 / 4</gadget>
<output>15</output>

<result>15</result>