On a map with a scale of 1:4000000, the measured distance between the two places is 9 centimeters. What is the actual distance in kilometers between the two places?
在一幅比例尺是1：4000000的地图上，量得两地的距离是9厘米，两地间的实际距离是多少千米．
<gadget id="calculator">1 / 4_000_000</gadget>
<output>1/4_000_000 = around 0</output>

<gadget id="calculator">9 / (1/4_000_000) / 100_000</gadget>
<output>360</output>

<result>360</result>