road is 40 meters long. Trees are planted on the side of the road. The distance between every two trees is 5 meters (both ends are planted). How many trees need to be planted?
一条马路长40米，在马路的一旁种树，每两棵之间的距离是5米(两端都种)，需要种多少棵树？
<gadget id="calculator">40 / 5</gadget>
<output>8</output>

<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<result>9</result>