The sum of the lengths of the sides of a cube is 60 cm, what is the surface area of the cube in cm**2.
一个正方体的棱长总和是60cm，这个正方体的表面积是多少cm**2．
<gadget id="calculator">60 / 12</gadget>
<output>5</output>

<gadget id="calculator">5 * 5 * 6</gadget>
<output>150</output>

<result>150</result>