A road is 220 meters long, and a tree is planted every 5.5 meters on both sides of the road (both ends are planted). How many trees should be planted in total?
一条路长220米，在路的两旁每隔5.5米栽一棵树(两端都栽)，一共要栽多少棵树？
<gadget id="calculator">220 / 5.5</gadget>
<output>40</output>

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

<gadget id="calculator">41 * 2</gadget>
<output>82</output>

<result>82</result>