Can't run python program

Id be very happy to know how to run the program? i've been given this command:

python3 calculator.py

I tried putting this text :

# Prompt for user inputa = float(int(input("Enter the first number: 1")))b = float(int(input("Enter the first number: 2")))python3 calculator.py

Maybe you have some insights? (My python version is 3.12)