What is the surface area of a cube surrounded by a 36 cm long iron wire?
用一根36厘米长的铁丝围成一个正方体框架，则这个正方体的表面积是多少．
<gadget id="calculator">36 / 12</gadget>
<output>3</output>

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

<result>54</result>