print('Please select an operation (+, /, *, -)')
users_input = input()
number1 = float(input('Please enter the first number !'))
number2 = float(input('Please enter the second number !'))
try:
    if users_input == '+':
        print(number1, '+', number2, '=', number1 + number2)
    elif users_input == '/':
        print(number1, '/', number2, '=', number1 / number2)
    elif users_input == '-':
        print(number1, '-', number2, '=', number1 - number2)
    elif users_input == '*':
        print(number1, '8', number2, '=', number1 * number2)
    else:
        raise ValueError
except ValueError:
    print('Bad input!')