The distance between A and B is 80 kilometers. A car travels from A to B at 60 kilometers per hour. Another bus travels from B to A at 40 kilometers per hour. They meet each other a few hours after departure. ?
甲乙两地相距80千米，一辆轿车从甲地开往乙地，每小时行60千米；另一辆客车从乙地开往甲地，每小时行40千米，出发后几小时相遇？
<gadget id="calculator">60 + 40</gadget>
<output>100</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>