A cuboid log is 4 meters long. If it is cut into 3 sections, the surface area will increase by 24 square decimeters. What is the volume of this log?
一个长方体木料，长4米，如果把它截3段，表面积增加24平方分米，这根木料的体积是多少．
<gadget id="calculator">24 / 4</gadget>
<output>6</output>

<gadget id="calculator">4 * 10</gadget>
<output>40</output>

<gadget id="calculator">6 * 40</gadget>
<output>240</output>

<result>240</result>