section of Chengdong Ring Road in Qingdao City is 450 meters long. It is planned to install a lamp every 5 meters. Lights will be installed on both sides of the road. Do you know how many lights are installed on both sides of the road?
青岛市城东环路一段长450米，计划每5米装一盏灯，路的两边都装灯，你知道路的两边共装了多少盏灯吗？
<gadget id="calculator">450 / 5</gadget>
<output>90</output>

<gadget id="calculator">90 + 1</gadget>
<output>91</output>

<gadget id="calculator">91 * 2</gadget>
<output>182</output>

<result>182</result>