On a map with a scale of 1:6000000, the distance between the two places is measured to be 10cm. Cars A and B drive towards each other from the two places at the same time and meet each other in 8 hours. Given that the speed ratio of cars A and B is 7:8, how many kilometers does car A travel per hour?
在比例尺是1：6000000的地图上，量得两地间的距离是10cm，甲、乙两辆车同时从两地相向开出，8小时相遇．已知甲、乙两车的速度比是7：8，甲车每小时行多少千米？
<gadget id="calculator">1 / 6_000_000</gadget>
<output>1/6_000_000 = around 0</output>

<gadget id="calculator">10 / (1/6_000_000) / 100_000 / 8</gadget>
<output>75</output>

<gadget id="calculator">7 + 8</gadget>
<output>15</output>

<gadget id="calculator">7 / 15</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">75 * (7/15)</gadget>
<output>35</output>

<result>35</result>