The distance from Dalun to Jiangyan is 15 kilometers. On a 1:6,000,000 map, what is the distance from Dalun to Jiangyan?
大伦至姜堰的距离是15千米，在一幅1：6000000的地图上，大伦至姜堰的距离是的多少．
<gadget id="calculator">1 / 6_000_000</gadget>
<output>1/6_000_000 = around 0</output>

<gadget id="calculator">15 * 100_000 * (1/6_000_000)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>