Dong Yujie walked 3 laps along the swimming pool for a total of 1200 meters. What is the circumference of the swimming pool in meters?
董雨洁沿着游泳池走了3圈共1200米，这个游泳池的周长是多少米．
<gadget id="calculator">1_200 / 3</gadget>
<output>400</output>

<result>400</result>