got weird fractional value when export a .chan file

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Hi, i got a weird case…
i create an object, in obj level, i set rotation-> rx ry rz to 4 5 6 consecutively. This object is still (no animation). Then in CHOP, i grab that channel using ‘object’ node, set compute to ‘rotation’. Then i export to .chan file. When i open the chan file with text editor, at frame 1, all the value are correct ( 4 5 6 for rx ry rz), but at frame 2 through the end of the range, i got : 3.99999952316284 4.99999952316284 6.

so the ‘4’ got converted to 3.99999952316284 , the ‘5’ is converted to 4.99999952316284 and ‘6’ is stay as 6. Why do i got this fractional value ???

the object is static , no animation at all. Anyone can give me the good reason ?

thanx
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