There is a square fish pond. Xiaohong walked 3 times around it, a total of 2400 meters. What is the area of the fish pond in square meters?
有一个正方形的鱼池，小红沿着它的四周走了3圈共2400米，鱼池的面积是多少平方米？
<gadget id="calculator">2_400 / 3 / 4</gadget>
<output>200</output>

<gadget id="calculator">200 * 200</gadget>
<output>40_000</output>

<result>40_000</result>