After a 3-meter-long cuboid is cut into two cuboids, the surface area increases by 18 square meters. What is the volume of the original cuboid?
一个长3米的长方体木料被横截成两个长方体后，表面积增加了18平方米，原来长方体木料的体积是多少．
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">9 * 3</gadget>
<output>27</output>

<result>27</result>