Two cars, A and B, drive opposite each other from two cities 600 kilometers apart. Car A travels 65 kilometers per hour, and Car B travels 55 kilometers per hour. How many hours after the two cars drive together?
甲乙两汽车从相距600千米的两城市相对开出，甲汽车每小时行65千米，乙汽车每小时行55千米，两车开出几小时后相遇？
<gadget id="calculator">65 + 55</gadget>
<output>120</output>

<gadget id="calculator">600 / 120</gadget>
<output>5</output>

<result>5</result>