The sum of the sides of a cube is 108 cm, what is its surface area in cm**2.
一个正方体的棱长之和是108cm，它的表面积是多少cm**2．
<gadget id="calculator">108 / 12</gadget>
<output>9</output>

<gadget id="calculator">9 * 9 * 6</gadget>
<output>486</output>

<result>486</result>