To make 100 cube iron boxes with a side length of 5 decimeters without a cover, what is the minimum area of iron sheets?
做100个无盖的棱长为5分米的正方体铁盒，至少需要多大面积的铁皮？
<gadget id="calculator">5 * 5 * 5 * 100</gadget>
<output>12_500</output>

<result>12_500</result>