How to divide ASCII code in Powershell

How to divide ASCII code in Powershell

so in Powershell I want to take the ASCII code of a document and divide it
all by a Variable. Here is example code.
$file = Get-Content $home\example.txt -encoding byte
$value = 32984729847569237498
$file/$value | Set-Content $home\example.txt -encoding byte
Now the problem is that it says I cant divide it because there is no
op.Division. I can multiply it but the problem there is that it just takes
the contents of example.txt and copies it 32984729847569237498 times. What
I want it to do is divide the ASCII code by 32984729847569237498 so that
you can only get the original contents of the file back if you multiply it
by 32984729847569237498.