On a map with a scale of 1:5,000,000, the distance between A and B on the map is 5 cm. A car travels from A to B for 8 hours. How many kilometers per hour does the car drive on average?
在比例尺是1：5000000的地图上量得甲、乙两地的图上距离是5厘米，一辆汽车从甲地到乙地行驶了8小时，这辆汽车平均每小时行多少千米？
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">5 / (1/5_000_000) / 100_000 / 8</gadget>
<output>125/4 = around 31.25</output>

<result>125/4 = around 31.25</result>