If the sum of the sides of a cube is 36 cm, what is its surface area?
一个正方体的棱长总和是36厘米，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>