cylinder with a height of 10 cm, if its height increases by 2 cm, then its area increases by 125.6 square centimeters, find the volume of this cylinder (take 3.14.)
一个高为10厘米的圆柱，如果它的高增加2厘米，那么它的面积就增加125.6平方厘米，求这个圆柱的体积(取3.14．)
<gadget id="calculator">125.6 / 2 / 3.14 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 10</gadget>
<output>3_140</output>

<result>3_140</result>