Here is an example of RSA encryption and decryption. The parameters used here are artificially small. Let

p $=17$ first prime number

q $=11$ second prime number

n $=$ pq $=187$

e$=7$

d $=23$

For the cipher text c$=2,$ the plaintext would be

a$.20$

b$.162$

c$.19$

d$.17$