Install street lights on both sides of a 100-meter street, and install one every 10 meters (both ends of the street should be installed). How many street lights should be installed in this section of the street?
在一段100米的街道两旁安装路灯，每隔10米安装一盏(街道的两头都要安装)，这段街道一共要安装多少盏路灯？
<gadget id="calculator">100 / 10</gadget>
<output>10</output>

<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<result>11</result>