On the Arbor Day on March 12, the teacher took the students to plant trees. Now they want to plant a tree every 40 meters on the side of the 280-meter road (both ends should be planted). How many trees should be planted?
3月12日植树节，老师带同学们去植树，现要在280米的公路一旁每隔40米栽一棵树(两端都要栽)，要栽多少棵呢？
<gadget id="calculator">280 / 40</gadget>
<output>7</output>

<gadget id="calculator">7 + 1</gadget>
<output>8</output>

<result>8</result>