On a map with a scale of 1:4,000,000, the distance from Beijing to Chuzhou is measured as 18.75 cm. What is the actual distance from Beijing to Chuzhou?
在比例尺是1：4000000的地图上，量得北京到滁州的距离为18.75厘米，求北京到滁州的实际距离是多少？
<gadget id="calculator">1 / 4_000_000</gadget>
<output>1/4_000_000 = around 0</output>

<gadget id="calculator">18.75 / (1/4_000_000) / 100_000</gadget>
<output>750</output>

<result>750</result>