When the New Year comes, colorful lights will be installed on both sides of the 1,000-meter-long Zhonghua Avenue, with one set every 5 meters (both ends must be installed). How many groups need to be installed?
新年来临，在1000米长的中华大街两边安装彩灯，每隔5米安装一组(两头都要安装)．需要安装多少组？
<gadget id="calculator">1_000 / 5</gadget>
<output>200</output>

<gadget id="calculator">200 + 1</gadget>
<output>201</output>

<gadget id="calculator">201 * 2</gadget>
<output>402</output>

<result>402</result>