How many square decimeters of glass are needed to make a cube-shaped glass fish tank (without a cover) with a side length of 8 decimeters?
做一个正方体状的玻璃鱼缸(无盖)，棱长8分米，需要玻璃多少平方分米？
<gadget id="calculator">8 * 8 * 5</gadget>
<output>320</output>

<result>320</result>