A bridge is 392 meters long, and a train is 128 meters long. It takes 20 seconds for the train to leave the bridge from the front of the car to the end of the bridge. How many meters does the train travel per second?
一座桥长392米，一列火车长128米，测得火车从车头上桥到车尾离桥共用了20秒，火车每秒行多少米？
<gadget id="calculator">392 + 128</gadget>
<output>520</output>

<gadget id="calculator">520 / 20</gadget>
<output>26</output>

<result>26</result>