If two cubes of equal volume are put together to form a cuboid, and the surface area is reduced by 18cm**2, what is the original volume of each cube in cm**3?
两个体积相等的正方体拼成一个长方体，表面积减少18cm**2，则原来每个正方体的体积是多少cm**3．
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

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

<result>27</result>