The distance between A and B is 400 kilometers. The bus and the car depart from A at the same time. The bus travels 50 kilometers per hour, and the car travels 80 kilometers per hour. According to this calculation, which car will arrive at B first? How much faster is the early car than the late car?
甲乙两城相距400千米，客车和轿车同时从甲城出发，客车每小时行50千米，轿车每小时行80千米，照这样计算，哪辆车先到达乙城？早到的车比晚到的车快多少时间？
<gadget id="calculator">400 / 50</gadget>
<output>8</output>

<gadget id="calculator">400 / 80</gadget>
<output>5</output>

<gadget id="calculator">8 - 5</gadget>
<output>3</output>

<result>3</result>