> That's a factor of about 2.2x, assuming 7% capital gains year-on-year.
Why would you assume 7% year on year? Did you look into Orange's stock price or quarterly/yearly reports, or did you think all companies have the same return as investing in the S&P500 would have?
https://www.boursorama.com/cours/1rPORA/
e.g. over 10 years, their stock price is roughly the same as it was back then after a few years slightly higher.