How many square decimeters of glass is needed to make a cube fish tank with a side length of 5 decimeters?
做一个棱长5分米的正方体鱼缸，至少需要多少平方分米的玻璃？
<gadget id="calculator">5 * 5 * 5</gadget>
<output>125</output>

<result>125</result>