Help me in solving CCLEARN problem

My issue

while i am giving the user input statement it is showing indentation error

My code

# cook your dish here
     num = int(input())
     ans= 2*num:

Learning course: Practice Python
Problem Link: CodeChef: Practical coding for everyone

Just remove the extra spaces u have used.
do it like this.

num = int(input())
ans = 2*num