The surface area of a cylinder is 125.6 square centimeters, and the product of the radius of the base and the height is 10 centimeters. Find the volume of the cylinder.
一个圆柱的表面积是125.6平方厘米，底面半径与高的积为10厘米，求这个圆柱的体积．
<gadget id="calculator">2 * 3.14 * 10</gadget>
<output>62.8</output>

<gadget id="calculator">125.6 - 62.8</gadget>
<output>62.8</output>

<gadget id="calculator">62.8 / 2</gadget>
<output>31.4</output>

<gadget id="calculator">31.4 * 10</gadget>
<output>314</output>

<result>314</result>