A circular skating rink has a total length of 180 meters. If a light is installed every 15 meters along the rink, how many lights are needed in total?
一个圆形溜冰场一周全长180米，如果沿着溜冰场每15米安装一盏灯，共需多少盏灯．
<gadget id="calculator">180 / 15</gadget>
<output>12</output>

<result>12</result>