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(float(num1/num2))
elif op == "*":
print(num1*num2)
else:
print("invalide operator")
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