How many square decimeters of wooden boards are needed to make three cubic wooden boxes without a cover whose edge length is 5 decimeters?
做3个棱长是5分米的无盖正方体木盒，需木板多少平方分米？
<gadget id="calculator">5 * 5 * 5 * 3</gadget>
<output>375</output>

<result>375</result>