The shape of a glass fish tank without a cover is a cube, and the side length is 4 decimeters. What is the minimum area of glass needed to make this fish tank?
一个无盖的玻璃鱼缸的形状是正方体，棱长是4分米，制造这个鱼缸至少需要多大的面积的玻璃．
<gadget id="calculator">4 * 4 * 5</gadget>
<output>80</output>

<result>80</result>