How many square decimeters of glass are needed to make a goldfish bowl without a cover, with a side length of 10dm?
用玻璃做一个无盖正方体的金鱼缸，边长都是10dm，需要多少平方分米的玻璃？
<gadget id="calculator">10 * 10 * 5</gadget>
<output>500</output>

<result>500</result>