If the sum of the sides of a cube is 36 decimeters, what is its surface area in square decimeters?
正方体的棱长之和是36分米，它的表面积是多少平方分米．
<gadget id="calculator">36 / 12</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">9 * 6</gadget>
<output>54</output>

<result>54</result>