On a map with a scale of 1:6,000,000, the distance between A and B is 9 centimeters. Two trains depart from A and B at the same time. A train travels 57 kilometers per hour, and B trains travel 43 kilometers per hour. Hours later the two cars meet?
在比例尺1：6000000的地图上，量得甲乙两地距离是9厘米，两列火车同时从甲乙两地相对开出，甲车每小时行57千米，乙车每小时行43千米，几小时后两车相遇？
<gadget id="calculator">1 / 6_000_000</gadget>
<output>1/6_000_000 = around 0</output>

<gadget id="calculator">57 + 43</gadget>
<output>100</output>

<gadget id="calculator">9 / (1/6_000_000) / 100_000 / 100</gadget>
<output>27/5 = around 5.4</output>

<result>27/5 = around 5.4</result>