scientific notation to expanded form ?

im writing a simple internal data compressor which uses the ANSI charecter codes and converts them into a large integer which is then divided by a number (based on the compression level) the problem is that when the data is decompressed it hase to times the integer by the divided number, but the number returned 4.36484128440388e+039 how can i convert it to its expanded form (109121032110097109101032105115032098111098)

#include <array.au3>
 

Func _decompressdata($data,$level)
$idata = _StringCut($data*$level,3)
Local $chr
For $i = 0 to UBound($idata) -1
$chr &= Chr($idata[$i])
Next
Return $chr
endFunc
Func _StringCut($string, $size)
$count = Ceiling(StringLen($string)/$size)
Dim $array[$count+1], $start = 1
For $i = 1 To $count
    $array[$i] = StringMid($string, $start, $size)
    $start += $size
Next
$array[0] = $count
_ArrayDelete($array,0)
Return $array
EndFunc