If the sum of the sides of a cube is 24 centimeters, what is its surface area in square centimetres?
一个立方体的棱长之和是24厘米，它的表面积是多少平方厘米．
<gadget id="calculator">24 / 12</gadget>
<output>2</output>

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

<result>24</result>