The teacher sent Xiao Ming to buy red paper to paste the rectangular boxes. He didn’t know the length, width and height. He just remembered that it was made of a 36-decimeter iron wire, and the length, width and height were all decimeters. How much would he need to buy at least?
老师派小明去买红纸来糊长方形箱子，不知长宽高，只记得是用一根36分米的铁丝做成的，而且长宽高都是整数分米，他至少要买多少才够用？
<gadget id="calculator">1 + 1 + 7</gadget>
<output>9</output>

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

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

<result>54</result>