Make this equation correct

Using your creativity, conversion skills and adding one letter (anywhere) to both sides, make the following equation correct. Same letter must be added to both sides.

V I E N T = D

Hint

Check the Tags

Is this equation correct?

VI CENT = DC

Reasoning

I think this would essentially translate, in French, to "6 hundred = 600" (in Roman numerals), where cent is French for hundred.
As Rand al'Thor pointed out in the comments, the language could be Latin, which would fit better in which case I think "hundred" translates to "centum" but often gets abbreviated as "cent".

• I was trying to work this out and you posted! (+1) Jun 17, 2020 at 12:50
• French or, more to the point, Latin? Jun 17, 2020 at 13:01
• @Randal'Thor Ah, yes that could make more sense, I don't really know Latin, doesn't hundred translate to "centum" or does it get shortened when counting? Jun 17, 2020 at 13:03
• Kudos @hexomino. One of these days I WILL come up with a puzzle that you and other incredibly smart guys on this site will take at least 1 hour to solve! Bucket List! :)
– DrD
Jun 17, 2020 at 13:15