On a map with a scale of (1/25000), use a scale of (1/20000) to draw it again. What is the length of AB and AB, which are 12.5 cm long on the original map, on the newly drawn map?
在比例尺为(1/25000)的地图，改用(1/20000)的比例尺重新画出来．原来图上长12.5厘米的AB两地，在新画的地图上长多少厘米？
<gadget id="calculator">1 / 25_000</gadget>
<output>1/25_000 = around 0.00004</output>

<gadget id="calculator">12.5 / (1/25_000)</gadget>
<output>312_500</output>

<gadget id="calculator">1 / 20_000</gadget>
<output>1/20_000 = around 0.00005</output>

<gadget id="calculator">312_500 * (1/20_000)</gadget>
<output>125/8 = around 15.625</output>

<result>125/8 = around 15.625</result>