If a cube is cut into two identical cuboids, the surface area increases by 18 square centimeters, find the surface area of the original cube.
把一个正方体切成两个完全相同的长方体，表面积增加了18平方厘米，求原来正方体的表面积．
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

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

<result>54</result>