How many square decimeters of planks are needed to make a cubic wooden box without a cover with a side length of 6 decimeters?
做一个棱长6分米的无盖正方体木箱，至少需要多少平方分米木板？
<gadget id="calculator">6 * 6 * 5</gadget>
<output>180</output>

<result>180</result>