A train is 230 meters long and passes through a tunnel at a speed of 22 meters per second. It takes 34 seconds for the train to leave completely. How long is the tunnel?
一列火车长230米，以每秒22米的速度通过一个隧道，从车头进去到完全离开共用34秒．隧道长多少米？
<result>418</result>