How many square decimeters of iron sheet are needed to make a cube iron box with a side length of 6 decimeters?
用铁皮做一个棱长6分米的正方体铁盒，需要铁皮多少平方分米？
<gadget id="calculator">6 * 6 * 6</gadget>
<output>216</output>

<result>216</result>