num1= float(input("Enter first number: "))
op= input("Enter operator: ")
num2= float(input("Enter second number: "))

if op == "+":
    print(num1 + num2)
elif op == "-":
    print(num1 - num2)
elif op == "/":
    print(num1 / num2)
elif op == "*":
    print(num1 * num2)
elif op == "**":
    print(num1 ** num2)

else:
    print("Error")