Xiaoqiang and Lili want to plant a tree every 10 meters on both sides of the 80-meter-long road, and both ends should be planted. How many trees will they plant in total?
小强和丽丽要在长80米的马路两旁每隔10米栽一棵树，并且两端都要栽，一共要栽多少棵？
<gadget id="calculator">80 / 10</gadget>
<output>8</output>

<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<gadget id="calculator">9 * 2</gadget>
<output>18</output>

<result>18</result>