To make a cube glass fish tank without a cover, the side length is 6 decimeters, how many square decimeters of glass should be used to make this fish tank?
做一个无盖的正方体玻璃鱼箱，棱长是6分米，做这个鱼箱至少要用多少平方分米的玻璃？
<gadget id="calculator">6 * 6 * 5</gadget>
<output>180</output>

<result>180</result>