A log with a length of 2 meters is cut into 3 sections, and the surface area increases by 48 square decimeters. What is the original volume of the log in cubic decimeters?
一根长2米的圆木，截成3段后，表面积增加了48平方分米，这根圆木原来的体积是多少立方分米．
<gadget id="calculator">48 / 4</gadget>
<output>12</output>

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

<gadget id="calculator">12 * 20</gadget>
<output>240</output>

<result>240</result>