I still have problems computing (without a calculator) for example: $R_{21}(3^{234})$
I know i have to use the chinese reminder theorem, bu before that, how do i get there? I know that i haw to split 21 into primes, e.g. $3*7$, and therefor $R_{3*7}((3^{39})^6)=..$.
I hope someone can briefly explain this to me with the given example, would be happy!
Thank you.
