On a map with a scale of 1:5000000, the distance between A and B is 4.6 cm. What is the actual distance between A and B in kilometers?
在比例尺是1：5000000的地图上，量得A、B两地的距离是4.6厘米，A、B两地的实际距离是多少千米千米．
<gadget id="calculator">1 / 50_000_000</gadget>
<output>1/50_000_000 = around 0</output>

<gadget id="calculator">4.6 / (1/50_000_000) / 10 / 100_000</gadget>
<output>230</output>

<result>230</result>