The distance between two stations A and B is 620 kilometers. A train of passenger cars is driving from station A to station B. At the same time, a train of trucks is driving from station B to station A. After 5 hours, they meet on the way. It is known that the truck travels 55 kilometers per hour. How many kilometers per hour? (Solution of column equation)
甲、乙两站相距620千米，一列客车从甲站开往乙站，同时一列货车从乙站开往甲站，经过5小时在途中相遇，已知货车每小时行55千米，客车每小时行多少千米？(列方程解)
<gadget id="calculator">55 * 5</gadget>
<output>275</output>

<gadget id="calculator">620 - 275</gadget>
<output>345</output>

<gadget id="calculator">345 / 5</gadget>
<output>69</output>

<result>69</result>