Given two prime numbers p & q, where p=3 and q=11.
Calculate n=p*q, so 3*11=33
N is for the modulus for the public and private keys, so N=3*11=33
Calculate the totient phi(n)=(p-1) *(q-1)
phi(n)= (3-1) *(11-1) =2*10=20
Choose integer e (public key) which is given at e=3
