The total length of a round ice skating rink is 300 meters. If a street light is installed every 15 meters, how many lights should be pressed in total?
圆形滑冰场的一周全长为300米，如果每隔15米安装一盏路灯，一共需要按几盏？
<gadget id="calculator">300 / 15</gadget>
<output>20</output>

<result>20</result>