The scale of a map is 1:40000000. The distance between A and B on the map is 6 cm. What is the actual distance in kilometers between the two places?
一幅地图的比例尺是1：40000000，图上A、B两地相距6厘米，两地之间的实际距离是多少千米？
<gadget id="calculator">1 / 40_000_000</gadget>
<output>1/40_000_000 = around 0</output>

<gadget id="calculator">6 / (1/40_000_000) / 100_000</gadget>
<output>2_400</output>

<result>2_400</result>