Plant trees on one side of a 40-meter-long sidewalk, plant one tree every 5 meters, and plant both ends. How many trees can be planted in total?
在40米长的人行道一侧栽树，每隔5米栽一棵，两头都栽，一共可以栽多少棵树？
<gadget id="calculator">40 / 5</gadget>
<output>8</output>

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

<result>9</result>