If a 2.5-meter cuboid is sawed into 4 sections on average, the surface area increases by 2.4 square decimeters. What is the original volume of this piece of wood?
把2.5米的长方体材料，平均锯成4段，表面积比原来增加2.4平方分米，原来这根木料的体积是多少立方分米．
<gadget id="calculator">2.4 / 6</gadget>
<output>0.4</output>

<gadget id="calculator">2.5 * 10</gadget>
<output>25</output>

<gadget id="calculator">0.4 * 25</gadget>
<output>10</output>

<result>10</result>