The distance between the two residential buildings is 65 meters. The environmental protection team will plant trees next to the path between the two buildings. Every two trees are 5 meters apart. How many trees will be planted in total?
两栋居民楼相距65米，环保小分队要在两楼间的小路旁种树，每两棵相隔5米，一共要种多少棵树？
<gadget id="calculator">65 / 5</gadget>
<output>13</output>

<gadget id="calculator">13 - 1</gadget>
<output>12</output>

<result>12</result>