A 12-meter-long cuboid is cut from the middle into two small cuboids, and the surface area is increased by 6 square meters. What is the volume of this wood in cubic meters?
把一根长12米的长方体木料从中间横截成两个小长方体，表面积增加了6平方米，原来这根木料的体积是多少立方米．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 * 12</gadget>
<output>36</output>

<result>36</result>