The actual distance from Beijing to Shanghai is about 1,050 kilometers. How many centimeters should be drawn on a 1:25,000,000 map?
从北京到上海实际距离大约是1050千米，画在1：25000000的地图上，应画多少厘米？
<gadget id="calculator">1 / 25_000_000</gadget>
<output>1/25_000_000 = around 0</output>

<gadget id="calculator">1_050 * 100_000 * (1/25_000_000)</gadget>
<output>21/5 = around 4.2</output>

<result>21/5 = around 4.2</result>