To plant trees on one side of a path with a total length of 100 meters, plant one tree every 4 meters (both ends must be planted), how many trees should be planted in total.
要在全长100米的小路一边植树，每隔4米栽一棵(两端都要栽)，一共要栽多少棵树．
<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<gadget id="calculator">25 + 1</gadget>
<output>26</output>

<result>26</result>