Seven Samurai
the books are called Three Musketeers… it is about four musketeers :(
Did you know there’s a movie called The Fifth Musketeer? It stars the four classic musketeers, plus a guy who is at no point a musketeer.

Never heard of it,

Schools should invest more in maths, those people can barely count

The French have four-times-twenty-ten-nine problems, but counting ain’t one. That’s why their most read maths book is “The count of Monte Cristo”.
Au contraire! There is only a single isle of Monte Cristo in that book, and it’s over a thousand pages long, which means it took THAT LONG to count to 1.
Gotta wait like 30 years to get that revenge for like no reason at the end