Cut a 3-meter-long cuboid piece of wood into 1-meter-long sections, and increase the surface area by 36 square decimeters. What is the original volume of this piece of wood?
把一长3米的长方体木料截成1米长为一段，表面积增加36平方分米，原来这根木料的体积是多少．
<gadget id="calculator">36 / 4</gadget>
<output>9</output>

<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">9 * 30</gadget>
<output>270</output>

<result>270</result>