Cutting a cube into two identical cuboids increases the surface area by 18 square meters. What is the volume of this cube.
把一个正方体切成两个完全一样的长方体，表面积增加了18平方米．这个正方体的体积是多少．
<gadget id="calculator">3 * 3 * 3</gadget>
<output>27</output>

<result>27</result>