Some trees are planted on the side of the road. The distance between two adjacent trees is 10 meters. Xiaoqing ran from the first tree to the 22nd tree. How many meters did he run in total?
路边栽了一些树，相邻两棵树之间的距离为10米，小青从第1棵树跑到第22棵树，他一共跑了多少米？
<gadget id="calculator">22 - 1</gadget>
<output>21</output>

<gadget id="calculator">10 * 21</gadget>
<output>210</output>

<result>210</result>