A cylinder and a cone have the same base and height, and the sum of their volumes is 12.56 cubic centimeters. What is the volume of the cone in cubic centimeters?
一个圆柱和一个圆锥等底等高，它们的体积之和是12.56立方厘米，这个圆锥的体积是多少立方厘米．
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">12.56 / 4</gadget>
<output>3.14</output>

<result>3.14</result>