The distance from A to B is measured on a map. It is known that the scale of this drawing is 1:3000000. How many kilometers is the actual distance from A to B?
在一张地图上量A地到B地的距离是5厘米，已知这张图纸的比例尺是1：3000000，A地到B地的实际距离是多少千米？
<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>