A new bridge has been rebuilt in the new countryside. The bridge is 169 meters long. Now the workers need to install street lights on both sides of the bridge, one every 13 meters, and both ends must be installed. How many lights will be installed on this bridge? Street lights?
新农村改造修建了一座新桥，桥长169米，现在工人师傅马上需要在桥的两旁安装路灯，每隔13米安一盏，且两端都要安装，那么这座桥一共要安装多少盏路灯？
<gadget id="calculator">169 / 13</gadget>
<output>13</output>

<gadget id="calculator">13 + 1</gadget>
<output>14</output>

<gadget id="calculator">14 * 2</gadget>
<output>28</output>

<result>28</result>