After Xiao Ming walked 37.5% of the journey from Dongcheng to Xicheng, he was still 3.5 kilometers away from the finish line. How many kilometers is the distance between the two cities?
小明从东城到西城，走了全程的37.5%后，距离终点还有3.5千米．东西两城之间的距离是多少千米？
<gadget id="calculator">37.5 / 100</gadget>
<output>0.375</output>

<gadget id="calculator">1 - 0.375</gadget>
<output>0.625</output>

<gadget id="calculator">3.5 / 0.625</gadget>
<output>5.6</output>

<result>5.6</result>