[rrd-users] Are there real numbers ?

[VladoPortos]

Hi all,

im playing with rrd tool and its realy great tool, but i noticed when i 
put data to database and fetch them back it give back it like this:

1179099300: 3.9988849010e+00 1.9994424505e+00
1179099600: 4.0000000000e+00 2.0000000000e+00
1179099900: 4.0000000000e+00 2.0000000000e+00
1179100200: 4.0000000000e+00 2.0000000000e+00
1179100500: 4.0000000000e+00 4.3577346667e-02

But im putting in real numbers like 4,2,5, etc... 3.999... i understand 
but 4.35777..??? why is that ?

Thanks and best regards
Vladimir