A square swimming pool, walk along this swimming pool for 160 meters, what is the side length of this swimming pool?
一个正方形的游泳池，沿着这个游泳池走一圈160米，这个游泳池的边长是多少米．
<gadget id="calculator">160 / 4</gadget>
<output>40</output>

<result>40</result>