There is a road along the railway line next to the railway line. A tractor driver driving on the road saw an oncoming train pass by him from the front to the rear and it took 15 seconds. It is known that the speed of the train is 60 km/h and the total length is 345 meters. Find the speed of the tractor?
铁路线旁有一沿铁路方向的公路，在公路上行驶的一辆拖拉机司机看见迎面驶来的一列火车从车头到车尾经过他身旁共用了15秒．已知火车车速为60千米/时，全长345米，求拖拉机的速度？
<gadget id="calculator">82.8 - 60</gadget>
<output>22.8</output>

<result>22.8</result>