The central road of the school is 200 meters long, and a tree should be planted every 8 meters on both sides of the central road (both ends should be planted). How many trees should be planted in total?
学校中心道长200米，在中心道两侧每隔8米栽一棵树(两端都要栽)，一共要栽多少棵树？
<gadget id="calculator">200 / 8</gadget>
<output>25</output>

<gadget id="calculator">25 + 1</gadget>
<output>26</output>

<gadget id="calculator">26 * 2</gadget>
<output>52</output>

<result>52</result>