If the sum of the sides of a cube is 24 cm, what is its surface area?
一个正方体的棱长总和是24厘米，它的表面积是多少．
<gadget id="calculator">24 / 12</gadget>
<output>2</output>

<gadget id="calculator">2 * 2 * 6</gadget>
<output>24</output>

<result>24</result>