The distance between A and B is 570 meters. Two trains leave from the two places at the same time. A train travels 110 kilometers per hour, while B travels 80 kilometers per hour. After how many hours do the two trains meet?
甲乙两地相距570米，两列火车同时从两地相向开出，甲车每小时110千米，乙车每小时行80千米，经过几小时两车相遇？
<gadget id="calculator">110 + 80</gadget>
<output>190</output>

<gadget id="calculator">570 / 190</gadget>
<output>3</output>

<result>3</result>