On a map with a scale of 1:5000000, the distance between the two places is 7.6 cm. Cars A and B drive towards each other at the same time and meet each other in 4 hours. It is known that the speed ratio of cars A and B is 9:10, how many kilometers does car A travel less than car B per hour?
在比例尺是1：5000000的地图上，量得两地间的距离是7.6厘米．甲、乙两辆汽车同时从两地相向开出，4小时相遇．已知甲、乙两车的速度比是9：10，求甲车每小时比乙车少行多少千米？
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">7.6 / (1/5_000_000) / 100_000 / 4</gadget>
<output>95</output>

<gadget id="calculator">9 + 10</gadget>
<output>19</output>

<gadget id="calculator">9 / 19</gadget>
<output>9/19 = around 0.473684</output>

<gadget id="calculator">95 * (9/19)</gadget>
<output>45</output>

<gadget id="calculator">95 - 45 - 45</gadget>
<output>5</output>

<result>5</result>