How many square centimeters of wooden boards are needed to make 6 cubic wooden boxes without a lid whose edge length is 20 centimeters?
做6个棱长是20厘米的无盖正方体木盒，需木板多少平方厘米？
<gadget id="calculator">20 * 20 * 5 * 6</gadget>
<output>12_000</output>

<result>12_000</result>