What is the surface area of a cube whose sum of sides is 36 m?
一个棱长总和是36m的立方体，它的表面积是多少．
<gadget id="calculator">36 / 12</gadget>
<output>3</output>

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

<result>54</result>