A tourist walks at a constant speed on a small path. The distance between the two adjacent trees on the roadside is equal. It takes him 11 minutes to walk from the first tree to the tenth tree. If the tourist walks for 22 minutes, he should reach How many trees.
一游人以等速在一条小路上散步，路边相邻两棵树的距离都相等，他从第一棵树走到第10棵树用了11分钟，如果这个游人走22分钟，应走到第多少棵树．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">11 / 9</gadget>
<output>11/9 = around 1.222222</output>

<gadget id="calculator">22 / (11/9)</gadget>
<output>18</output>

<gadget id="calculator">18 + 1</gadget>
<output>19</output>

<result>19</result>