On a map with a scale of 1:4000000, the distance between A and B is 6 cm. It takes 4 hours for a car to drive from A to B, how many kilometers per hour does the car travel on average?
在比例尺是1：4000000的地图上量得甲乙两地之间的距离是6厘米．一辆汽车从甲地开往乙地需要4小时，这辆汽车平均每小时行驶多少千米？
<gadget id="calculator">1 / 4_000_000</gadget>
<output>1/4_000_000 = around 0</output>

<gadget id="calculator">6 / (1/4_000_000) / 100_000 / 4</gadget>
<output>60</output>

<result>60</result>