The length of the railway between AB and AB is 460 kilometers. A passenger train runs from station A to station B, and at the same time, a freight train travels from station B to station A. The passenger car travels 60 kilometers per hour, and the freight train travels 55 kilometers per hour. After how many hours did the two cars meet?
AB两站之间的铁路长460千米，一列客车从A站开往B站，同时有一列货车从B站开往A站，客车每小时行60千米，货车每小时行55千米，经过几小时两车相遇？
<gadget id="calculator">60 + 55</gadget>
<output>115</output>

<gadget id="calculator">460 / 115</gadget>
<output>4</output>

<result>4</result>