On New Year's Day, the school arranges a square flower bed with a side length of 5 meters, and a total of 500 potted flowers are needed. How many pots are needed per square meter on average?
元旦，学校布置一个边长为5米的正方形花坛，一共需要盆花500盆．平均每平方米需要盆花多少盆？
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">500 / 25</gadget>
<output>20</output>

<result>20</result>