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)
else:
print("Invalid operator")
813932176
Объяснение: