There is a cylinder with a height of 10 cm. After reducing its height by 2 cm, the surface area of the obtained cylinder is reduced by 12.56 square centimeters. Find the volume of the original cylinder in square centimeters? (π=3.14) how much
有一个高为10厘米的圆柱体，将它的高减少2厘米后，得到的圆柱体的表面积就减少了12.56平方厘米，求原来圆柱体的体积是多少平方厘米？(π=3.14)多少
<gadget id="calculator">12.56 / 2 / 3.14 / 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 1 * 10</gadget>
<output>31.4</output>

<result>31.4</result>