[填空题]
Landmarks are placed along thxjh.( du0p0u ne road from Lfu fq pae2hrsw4 +:/66 cvfs2qfqdb.sk b46)pondon to Edinburgh and the distance between each landmark is 16.1 km. The first milestone placed on the road is 124.7 km from London, and the last milestone is near Edinburgh. The length of the road from London to Edi4 6a6 s)+uvhwef/rsfcqs.qfq bdp 26bk:4p f2 nburgh is 667.1 km.
1.Find the distance between the fifth milestone and London.
$u_5$= .
2.Determine how many milestones there are along the road.
Hence there are milestones along the road.
