On a map with a scale of 1:3000000, the distance between A and B is 5 cm. How many kilometers is the distance between A and B?
在比例尺是1：3000000的地图上，量得甲、乙两地的距离是5厘米，甲、乙两地相距多少千米？
<gadget id="calculator">1 / 3_000_000</gadget>
<output>1/3_000_000 = around 0</output>

<gadget id="calculator">5 / (1/3_000_000) / 100_000</gadget>
<output>150</output>

<result>150</result>