A cylinder with a base diameter of 10 cm is cut along the radius and height of the base to form an approximate cuboid. The surface area of this cuboid is 80 cm2 larger than that of the original cylinder. What is the volume of the original cylinder in cubic centimeters? ?
将一个底面直径是10厘米的圆柱体，沿底面半径和高切开，拼成一个近似长方体，这个长方体的表面积比原来圆柱体的表面积大了80平方厘米，原来圆柱体的体积是多少立方厘米？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

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

<gadget id="calculator">80 / 2 / 5</gadget>
<output>8</output>

<gadget id="calculator">3.14 * 25 * 8</gadget>
<output>628</output>

<result>628</result>