On a map with a scale of 1:5,000,000, the length between A and B is 3.4 cm. How many hours does it take for a car to travel from A to B at a speed of 45 kilometers per hour?
在一幅比例尺是1：5000000的地图上，量得甲、乙两城之间长3.4厘米，一辆汽车以每小时45千米的速度从甲城开往乙城，需要多少小时．
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">3.4 / (1/5_000_000) / 100_000 / 45</gadget>
<output>3.777778</output>

<result>3.777778</result>