The sum of the volumes of the cylinder and the cone with the same base and height is 25.12cm**3, what is the volume of the cylinder in cm**3.
等底等高的圆柱和圆锥体积之和是25.12cm**3，圆柱体积是多少cm**3．
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">25.12 / 4</gadget>
<output>6.28</output>

<gadget id="calculator">6.28 * 3</gadget>
<output>18.84</output>

<result>18.84</result>