To make a glass aquarium (without cover) with a side length of 8 decimeters, at least how many square decimeters of glass do you need?
做一个棱长是8分米的正方体的玻璃鱼缸(无盖)，至少需要多少平方分米玻璃？
<gadget id="calculator">8 * 8 * 5</gadget>
<output>320</output>

<result>320</result>