The total length of a round playground is 1800 meters. If a lamp is installed every 12 meters along this circle, how many lamps need to be installed in total?
圆形的操场的一周全长是1800米．如果沿着这一圈每隔12米安装一盏灯，一共需要装几盏灯？
<gadget id="calculator">1_800 / 12</gadget>
<output>150</output>

<result>150</result>