If a 10 decimeter long cylinder is sawn into 2 sections, the increased area is 12.56dm**2. So, what is the volume of the original stick?
把一根10分米长的圆柱体木条，锯成2段，增加的面积是12.56dm**2．那么，原来木条的体积是多少．
<gadget id="calculator">12.56 / 2</gadget>
<output>6.28</output>

<gadget id="calculator">6.28 * 10</gadget>
<output>62.8</output>

<result>62.8</result>