Weld a cube frame with 36dm long iron bars, and prepare to glue planks on its sides, at least how many square decimeters of planks should be prepared?
用36dm长的铁条焊接成一个正方体框架，并准备在它的各面粘上木板，至少要准备多少平方分米的木板？
<gadget id="calculator">36 / 12</gadget>
<output>3</output>

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

<result>54</result>