Write a Python program $($called q$2.$py$)$ that accepts an integer n $(1<=$ n $<=9)$ and compute the value of n $+$ nn $+$ nnn$.$

There are multiple ways to complete this problem. One basic method that we have covered so far is to rely on number systems.

nn $=$ n $*10+$ n

nnn $=$ n $*100+$ n $*10+$ n