Haz una calculadora científica

def calculadora(op, a, b):
  if op == "+":
    return a + b
  elif op == "-":
    return a - b
  elif op == "*":
    return a * b
  elif op == "/":
    return a / b
  else:
    return "Error"

print(calculadora("+", 2, 3))
print(calculadora(