On a map with a scale of 1:5000000, the distance between A and B is 6cm. What is the actual length of AB and AB?
在比例尺1：5000000的地图上量得A、B两地之间的为6cm．AB两地实际长多少千米．
<gadget id="calculator">6 / 100_000</gadget>
<output>3/50_000 = around 0.00006</output>

<gadget id="calculator">5_000_000 * (3/50_000)</gadget>
<output>300</output>

<result>300</result>