If the sum of the sides of a cube is 60 cm, what is the area of each face?
一个正方体的棱长总和是60cm，它的每个面的面积是多少．
<gadget id="calculator">60 / 12</gadget>
<output>5</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<result>25</result>