On a map with a scale of 1:6,000,000, the distance between the two places is measured to be 5 centimeters, and a car can travel the entire distance in 3 hours. What is the speed of this car in kilometers?
在比例尺是1：6000000的地图上，量得两地距离是5厘米，一辆汽车3小时走完全程．求这辆汽车的速度是多少千米？
<gadget id="calculator">1 / 6_000_000</gadget>
<output>1/6_000_000 = around 0</output>

<gadget id="calculator">5 / (1/6_000_000) / 100_000 / 3</gadget>
<output>100</output>

<result>100</result>