To make a cube glass fish tank without a cover, the side length is 5 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缸，棱长5分米，制作这个鱼缸至少需要用多少平方分米的玻璃？
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">5 * 25</gadget>
<output>125</output>

<result>125</result>