There are four line segments of 8.034 cm, 8.043 cm, 7.58 m and 7.508 km respectively. What is the longest of these four line segments in kilometers?
有四条线段分别8.034厘米、8.043厘米、7.58米和7.508千米，这四条线段中最长的是多少千米
<result>7.508</result>