The distance between A and B is 380 kilometers. Two cars drive from the two places at the same time. A car travels 45 kilometers per hour, and B travels 50 kilometers per hour. How many hours later will the two cars meet?
甲、乙两地之间相距380千米，两辆汽车同时从两地相对开出，甲车每小时行45千米，乙车每小时行50千米，几小时后两车相遇？
<gadget id="calculator">45 + 50</gadget>
<output>95</output>

<gadget id="calculator">380 / 95</gadget>
<output>4</output>

<result>4</result>