A cuboid is exactly cut into two cubes, and the surface area increases by 18 square meters after cutting, what is the volume of the cuboid in cubic meters?
一个长方体恰好截成两个正方体，截开后表面积增加18平方米，这个长方体的体积是多少立方米．
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

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

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">9 * 6</gadget>
<output>54</output>

<result>54</result>