cuboid of 8 decimeters long is sawed into 3 sections, and the surface area increases by 12 square decimeters. What is the volume of this lumber?
一根长8分米的长方体木料锯成3段后，表面积增加12平方分米，这根木料的体积是多少．
<gadget id="calculator">12 / 4</gadget>
<output>3</output>

<gadget id="calculator">3 * 8</gadget>
<output>24</output>

<result>24</result>