The sum of the lengths of the sides of a cube is 36 decimeters, what is the surface area of the cube in decimeters**2.
一个正方体的棱长之和是36分米，这个正方体的表面积是多少分米**2．
<gadget id="calculator">36 / 12</gadget>
<output>3</output>

<gadget id="calculator">3 * 3 * 6</gadget>
<output>54</output>

<result>54</result>