The distance between A and B measured on a map with a scale of 1:4000000 is 5 cm. It takes about 4 hours for a car to drive from A to B. How many kilometers does the car travel per hour?
在比例尺是1：4000000的地图上量的甲乙两地的距离是5厘米，一辆汽车从甲地开往乙地大约需要4小时，这辆汽车每小时行多少千米．
<gadget id="calculator">4_000_000 / 100_000</gadget>
<output>40</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">40 * (5/4)</gadget>
<output>50</output>

<result>50</result>