There is a 2-meter-long cylindrical log whose surface area increases by 50.24 square decimeters after sawing into 3 sections. What is the volume of this log?
有根2米长的圆柱木料，锯成3段后表面积增加了50.24平方分米，这根木料的体积是多少．
<gadget id="calculator">50.24 / 4</gadget>
<output>12.56</output>

<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">12.56 * 20</gadget>
<output>251.2</output>

<result>251.2</result>