Translate to French:

And Stéphane Chermanne and Geoffrey Monturier must surely agree.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Et c’est ce que doivent penser, plus souvent qu’à leur tour, Stéphane Chermanne et Geoffrey Monturier.