If the height of a cylinder increases by 2 centimeters, the surface area will increase by 25.12 square centimeters. How many cubic centimeters will the volume increase at this time?
一个圆柱如果增高2厘米，表面积就增加25.12平方厘米，这时体积增加多少立方厘米．
<gadget id="calculator">25.12 / 2 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 2</gadget>
<output>25.12</output>

<result>25.12</result>