Changsha Xiangjiang Bridge is currently the largest and longest double-curved arch bridge in my country, with a total length of 1.25 kilometers. It is drawn on a map with a scale of 1:10000. What is the distance in centimeters on the map?
长沙湘江大桥是我国目前最大最长的双曲拱桥，全长1.25千米，画在一副比例尺为1：10000的地图上，图上距离是多少厘米．
<gadget id="calculator">1 / 10_000</gadget>
<output>1/10_000 = around 0.0001</output>

<gadget id="calculator">1.25 * 100_000 * (1/10_000)</gadget>
<output>12.5</output>

<result>12.5</result>