a. Each ot the 10 digits ( 0,1,2, ... 9) is matched by a certain letter
of English alphabet.
b. The alphametic equation bhelow i.e.
GREEN-GRAY=AZURE ,
using this matching code, has an unique solution.

Once you get it you will know, what is the value of the product T*R*A*I*N.

Well, what is it ?

Please provide both the answer and your reasoning.