The community garden is a rectangle with a length of 60 meters and a width of 40 meters. Now you want to plant trees around the garden, at all four corners, and every two adjacent trees are 5 meters apart. How many trees should you plant in total?
小区花园是一个长60米、宽40米的长方形．现在要在花园四周栽树，四个角上都要栽，每相邻两棵间隔5米，一共要栽多少棵树．
<gadget id="calculator">60 + 40</gadget>
<output>100</output>

<gadget id="calculator">100 * 2</gadget>
<output>200</output>

<gadget id="calculator">200 / 5</gadget>
<output>40</output>

<result>40</result>