The length of a rectangular flower bed is 20 meters and the width is 15 meters. Now we want to plant chrysanthemums around the four corners of this flower bed. Every two adjacent chrysanthemums are separated by 5 meters. How many chrysanthemums should we plant in total?
一个长方形花坛的长是20米，宽是15米，现在要在这个花坛的四周栽菊花，四个角上都要栽，每相邻两棵菊花间隔5米，一共要栽多少棵菊花？
<gadget id="calculator">20 + 15</gadget>
<output>35</output>

<gadget id="calculator">35 * 2</gadget>
<output>70</output>

<gadget id="calculator">70 / 5</gadget>
<output>14</output>

<result>14</result>