Plant trees between two gazebos 200 meters apart, and plant one tree every 25 meters. How many trees can be planted?
在相距200米的两个凉亭之间栽树，每隔25米栽一棵，能栽几棵树？
<gadget id="calculator">200 / 25</gadget>
<output>8</output>

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

<result>7</result>