The distance between A and B is 560 kilometers. A truck drives from A to B at a speed of 60 kilometers per hour. A passenger car leaves B at the same time and travels 80 kilometers per hour. After several hours and two Car meet?
甲乙两地相距560千米，一辆货车以60千米/每小时的速度从甲地开往乙地，一辆客车同时从乙地相对开出，每小时行80千米，经过几小时两车相遇？
<gadget id="calculator">60 + 80</gadget>
<output>140</output>

<gadget id="calculator">560 / 140</gadget>
<output>4</output>

<result>4</result>