There are two trains, one train is 238 meters long and travels 16 meters per second, and the other train is 357 meters long and travels 19 meters per second. How many seconds does it take for two cars to move towards each other from the front of the car to the rear of the car.
有两列火车，一列火车长238米，每秒钟行16米，另一列火车长357米，每秒钟行19米．两车相向而行，从车头相遇到车尾离开需要多少秒钟．
<gadget id="calculator">238 + 357</gadget>
<output>595</output>

<gadget id="calculator">16 + 19</gadget>
<output>35</output>

<gadget id="calculator">595 / 35</gadget>
<output>17</output>

<result>17</result>