If you pay 10 Euros per day in a School Cafeteria, and you go there for nine years, how much do you pay for the whole nine years?
Well....here in the US, we have a standard school year of 180 days....so just multiply 180 x 9 x 10 to get your answer in euros
(However, now that I think about it, you won't get many lunches here in the States, because I'm not aware that anyone accepts payment in euros.......better to take your chances and move to France......)