how to take string input in python and then do mathematical operation on it code example

Example 1: how to get user inout in python

#just get input
test = input()

#add a custom message
test = input("Please enter your information: ")

#turning what is inputed into a differnt type of data
test = int(input("Please enter your information: "))

Example 2: python read input

entered_input = input()