Hello, Raoh!

In a library, books are being coded with this method:

. .

What is the code of the book?

i followed some hints,and i found the code (Euclid's division)

Is it correct? . . I got

Is there any other way to solve this problem?

Because i don't understand how the Euclid's division helps find the solution.

We are working with three-digit "numbers", written in base-26,

. . using the "digits": .

With the Euclidean Algorithm, we have: .