The height of a cylinder is increased by 5cm, and the surface area is increased by 157cm**2, how much is the volume increased?
一个圆柱的高增加5cm，表面积增加了157cm**2，求体积增加了多少？
<gadget id="calculator">157 / 5 / 3.14 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25 * 5</gadget>
<output>392.5</output>

<result>392.5</result>