Workers want to install a street lamp every 40m (both ends) on one side of a 1600m-long road. How many street lamps need to be installed in total?
工人们要在一条长为1600m的公路一侧，每隔40m安装一盏路灯(两端都安装)，一共需要安装多少盏路灯？
<gadget id="calculator">1_600 / 40</gadget>
<output>40</output>

<gadget id="calculator">40 + 1</gadget>
<output>41</output>

<result>41</result>