One side of the runway of the school sports field is 400 meters long, and a tree is planted every 10 meters from the beginning to the end. How many trees are planted in total?
学校运动场的跑道一侧长400米，从头到尾每隔10米栽一棵树，一共栽了多少棵树．
<gadget id="calculator">400 / 10</gadget>
<output>40</output>

<gadget id="calculator">40 + 1</gadget>
<output>41</output>

<result>41</result>