In the morning, Xiao Ming ran 4 laps around a square garden and ran a total of 480 meters. What is the side length of this garden in meters?
早上小明围着一个正方形的花园跑了4圈，共跑了480米，这个花园的边长是多少米？
<gadget id="calculator">480 / 4 / 4</gadget>
<output>30</output>

<result>30</result>