If a piece of wood with a length of 2 meters is cut into 4 sections on average, the surface area is increased by 120 square decimeters, what is the original volume of the piece of wood?
把一根长2米的木料平均截成4段，表面积增加120平方分米，这根木料原来的体积是多少．
<gadget id="calculator">120 / 6</gadget>
<output>20</output>

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

<gadget id="calculator">20 * 20</gadget>
<output>400</output>

<result>400</result>