A boulevard in the park has a total length of 800 meters, and a trash can is placed every 20 meters on one side of it from beginning to end. How many trash cans are needed in total?
公园内一条林荫大道全长800米，在它的一侧从头到尾每隔20米放一个垃圾桶．一共需要多少个垃圾桶？
<gadget id="calculator">800 / 20</gadget>
<output>40</output>

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

<result>41</result>