If a 10 decimeter long cylinder is cut into 3 sections, the surface area increases by 12.56cm**2, what is the volume of the original cylinder?
把一根10分米长的圆柱截成3段，表面积增加12.56cm**2，原来圆柱体的体积是多少．
<gadget id="calculator">12.56 / 4</gadget>
<output>3.14</output>

<gadget id="calculator">3.14 * 10 * 10</gadget>
<output>314</output>

<result>314</result>