Plant trees on both sides of a 200-meter-long road, and plant one tree every 5 meters. How many trees should be planted in total?
在一条长200米的公路两旁栽树，每隔5米栽一棵，一共要栽多少棵？
<gadget id="calculator">200 / 5</gadget>
<output>40</output>

<gadget id="calculator">40 + 1</gadget>
<output>41</output>

<gadget id="calculator">41 * 2</gadget>
<output>82</output>

<result>82</result>