On a map with a scale of 1:20000000, the length of A and B is measured to be 5 cm. If it is drawn on a map with a scale of 1:25000000, how many centimeters should be drawn?
在一幅比例尺是1：20000000的地图上，量得甲、乙两地长5cm，如果把它画在比例尺是1：25000000的地图上，应画多少厘米？
<gadget id="calculator">1 / 20_000_000</gadget>
<output>1/20_000_000 = around 0</output>

<gadget id="calculator">5 / (1/20_000_000)</gadget>
<output>100_000_000</output>

<gadget id="calculator">1 / 25_000_000</gadget>
<output>1/25_000_000 = around 0</output>

<gadget id="calculator">100_000_000 * (1/25_000_000)</gadget>
<output>4</output>

<result>4</result>