Calculating when renaming

Is it possible to calculate when renaming? The file name contains a number. For the new file name I would like to deduct a certain amount. Example:

old: Mit Schirm, Charme und Melone E102 Robin Hood spielt mit
new: Mit Schirm, Charme und Melone E24 Robin Hood spielt mit

It's OldNumber minus 78.

Reply to #1:

Hi Katharina,

That would be the Renumber method you'd use in that situation.

https://www.advancedrenamer.com/user_guide/v4/me thod_renumber

Number position: 1
Change to: relative to existing number
Number difference: -78
Handle negative numbers CHECKED
Zero padding: No padding
Apply to: Name

I personally had a problem conceptualizing the first field, but it's really simple: it's just a number representing the place within the filename that the target number falls, in relation to all other numbers in the filename. If your filename was

Mit Schirm, Charme und Melone S5E102 Robin Hood spielt mit

Then the Number position would be 2, because it now follows another number within the name. And so on.

Best,
DF