i got a question about variables in inno

[ahmedwaill]

hello, i've got a question i'm using the WPI script, but i wanted to add in the

[Setup]
UninstallDisplaySize={#Size2}

and i can easily define a variable and called it Size 2 with the number, it should be like the file size in MB×1024×1024
so can't i just make a variable to calculate it automatically ?
i got already a variable called
Size
that got the file size in MB, so i can't use it like

define Size2 "{#Size}*1024*1024"

or something like that ?!
thanks a lot.