How many square decimeters of iron sheet is needed to make a cube iron box with a side length of 6 decimeters without a cover?
做一个无盖的棱长为6分米的正方体铁盒，至少需要多少平方分米的铁皮．
<gadget id="calculator">6 * 6 * 5</gadget>
<output>180</output>

<result>180</result>