The total length of a round ice skating rink is 200 meters. Install a lamp every 10 meters along this circle, how many lamps should be installed in total.
圆形滑冰场的一周全长是200米．沿着这一圈每隔10米安装一盏灯，一共要安多少盏灯．
<gadget id="calculator">200 / 10</gadget>
<output>20</output>

<result>20</result>