The community needs to install street lights on both sides of the 300-meter road, one every 10 meters (both ends are installed), how many street lights are needed in total?
社区要在300米的道路两侧安装路灯，每隔10米安装一盏(两端都安)，一共需要多少盏路灯？
<gadget id="calculator">300 / 10</gadget>
<output>30</output>

<gadget id="calculator">30 + 1</gadget>
<output>31</output>

<gadget id="calculator">31 * 2</gadget>
<output>62</output>

<result>62</result>