Xiaoyue is walking along a road parallel to the railway. Her walking speed is 2 meters per second. At this time, a train came from behind Xiaoyue, and it took 18 seconds from the front of the train to catch up with her to the time when the rear of the train left her. Given that the speed of the train is 17 meters per second, find the length of the train.
小悦沿着一条与铁路平行的公路散步，她散步的速度是每秒2米．这时从小悦背后开来一列火车，从车头追上她到车尾离开她共用了18秒．已知火车速度是每秒17米，求火车的长度．
<gadget id="calculator">17 - 2</gadget>
<output>15</output>

<gadget id="calculator">15 * 18</gadget>
<output>270</output>

<result>270</result>