The distance between A and B is 440 kilometers. Two cars, A and B, drive from the two places at the same time. Car A travels 60 kilometers per hour, and car B travels 50 kilometers per hour. How long does it take for the two cars to meet?
A、B两地相距440千米，甲、乙两辆汽车同时从两地相对开出，甲车每时行60千米，乙车每时行50千米，两车开出几时后相遇？
<gadget id="calculator">60 + 50</gadget>
<output>110</output>

<gadget id="calculator">440 / 110</gadget>
<output>4</output>

<result>4</result>