To make a cube glass aquarium without a cover and with a side length of 4dm, how much glass dm**2 should be used to make this aquarium?
做一个无盖、棱长是4dm的正方体玻璃鱼缸，制作这个鱼缸至少需要用玻璃多少dm**2？
<gadget id="calculator">4 * 4 * 5</gadget>
<output>80</output>

<result>80</result>