A square swimming pool, it takes 64 meters to walk around the swimming pool, what is the side length of the swimming pool in meters?
一个正方形的游泳池，围着这个游泳池走一圈要走64米，这个游泳池的边长是多少米．
<gadget id="calculator">64 / 4</gadget>
<output>16</output>

<result>16</result>