Analyze number to specific results

Hello everyone
I have a number in Range("D6") which is 57439.25

I need to analyze the number in range("G6:G9") so as to get the results as following :
50000 In G6
7000 In G7
400 In G8
39 In G9

and ignore that part 0.25

If possible I prefer UDF function to do that task
Thanks advanced

This

Formula:

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will return you:

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It can be fixed to get 39 instead of 30 and 9 but this would be simplest.

Why do you prefer a UDF when a normal function is perfectly adequate

G6:
=ROUNDDOWN($D$6,-4)

G7:
=ROUNDDOWN($D$6,-3)-G6

G8:
=ROUNDDOWN($D$6,-2)-H6-G6

G9:
=ROUND(D6-SUM(G6:I6),0)

Thank you very much for both of you
I tested your suggestions but I didn't get the expected results

See the attached file.

Thank you Mr. oeldere
It's working well

I'm searching for UDF function to do that task .. Is that possible ?
Another point I used Int function in your formula so as to get the integer number without fractions ..

Here, try this:

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Use it as:

Formula:

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Thank you very much Mr zbor for this nice udf
I tested it but I got incorrect results
I will attach a file again with the expected resutls

Try now:

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Yes Yes Mr. zbor
That's exactly what I need .. You are all great people
Thank you very much for this wonderful UDF function