An engineering team installed 1,200 street lamps in the first month, and 1,300 street lamps in the second month. At this time, there are still 500 street lamps that have not been installed. Then the total number of installed street lamps is how many times the number of uninstalled street lamps.
某工程队第一个月安装路灯1200盏，第二个月安装路灯1300盏，此时，还剩500盏路灯未安装，那么已安装路灯的总数是未安装路灯数量的多少倍．
<gadget id="calculator">1_200 + 1_300</gadget>
<output>2_500</output>

<gadget id="calculator">2_500 / 500</gadget>
<output>5</output>

<result>5</result>