On a map with a scale (1/4000000), the distance between A and B is 8cm. So, what is the actual distance in kilometers between the two places?
在比例尺(1/4000000)是的地图上，量得甲、乙两地的距离是8cm．那么，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">8 / (1/4_000_000) / 100_000</gadget>
<output>320</output>

<result>320</result>