On a map with a scale of 1:8000000, the distance between A and B is 15cm. Cars A and B start at the same time and drive towards each other. After 10 hours of meeting, it is known that the speed of car A is that of car B (5/7). How many kilometers do you travel?
在比例尺1：8000000的地图上量得AB两地相距15cm，甲乙两车分别同时出发相对而行，经过10小时相遇，已知甲车速度是乙车的(5/7)，甲车每小时行多少km？
<gadget id="calculator">1 / 8_000_000</gadget>
<output>1/8_000_000 = around 0</output>

<gadget id="calculator">15 / (1/8_000_000) / 100_000 / 10</gadget>
<output>120</output>

<gadget id="calculator">5 + 7</gadget>
<output>12</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">120 * (5/12)</gadget>
<output>50</output>

<result>50</result>