We see the examples of (3) and (6)
in this section.
By setting *n*=10 in a polynomial we can have the corresponding
decimal number. Let us see the cases of our polynomials (3)
and (6). Putting *n*=10 in (3) gives us

(6) gives us as well

These kinds of relations can be calculated in the other figure systems
(*n*-adic number system).
For example, by putting *n*=5 in (3) we get

and