Uncle Wang's fish pond is rectangular, 100 meters long and 60 meters wide. Now I am going to plant trees around the fish pond, one tree every 20 meters, and all four corners. How many trees will be planted in total?
王大伯家的鱼塘是长方形，长100米，宽60米．现在准备在鱼塘的四周栽树，每隔20米栽1棵，四个角都栽，一共要栽多少棵？
<gadget id="calculator">100 + 60</gadget>
<output>160</output>

<gadget id="calculator">2 / 20</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">160 * (1/10)</gadget>
<output>16</output>

<result>16</result>