Description: we assume that the earth is a standard sphere, the children can only travel along the surface, whereas the Earth s equatorial circumference is 40,000 km.
Input
More test data group. The first line is a positive integer T (1 <= T <= 1000), indicated that the number of test data group.
Here are T lines, each line separated by a space of four integers A, B, C, D, <A,B> said latitude and longitude of the place of embarkation, <C,D> that the purpose of latitude and longitude locations. Which 0 <= A, C <360 said longitude,-90 <= B, D <= 90 that latitude, that latitude in the southern hemisphere is negative.
Output
For each test data, the output contains a number of his party, said that the minimum distance of travel mileage.
The results of three decimal places to retain.
Sample Input
2
3,003,000
150 45 150-45
Sample Output
10000.000
10000.000
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huanqiulvxing
.............\Debug
.............\.....\f1.obj
.............\.....\huanqiulvxing.exe
.............\.....\huanqiulvxing.ilk
.............\.....\huanqiulvxing.pch
.............\.....\huanqiulvxing.pdb
.............\.....\vc60.idb
.............\.....\vc60.pdb
.............\f1.cpp
.............\huanqiulvxing.dsp
.............\huanqiulvxing.dsw
.............\huanqiulvxing.ncb
.............\huanqiulvxing.opt
.............\huanqiulvxing.plg
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