Xiao Ming has 12 trees (planted at both ends) to the school, and each tree is 200 meters apart. Xiao Ming walks 50 meters in one minute on average, so how many minutes does it take him to reach the school?
小明到学校一共有12棵树(两端都栽)，每棵树相距200米，小明平均一分钟走50米，那么他走到学校要多少分钟．
<gadget id="calculator">12 - 1</gadget>
<output>11</output>

<gadget id="calculator">11 / 50</gadget>
<output>11/50 = around 0.22</output>

<gadget id="calculator">200 * (11/50)</gadget>
<output>44</output>

<result>44</result>