input: Write a function to convert a given temperature value from Fahrenheit to Celsius. The function should take a temperature in Fahrenheit as input and return the temperature in Celsius rounded to two decimal places.
  assert fahrenheit_to_celsius(32) == 0.0
  assert fahrenheit_to_celsius(212) == 100.0
  assert fahrenheit_to_celsius(98.6) == 37.0
  assert fahrenheit_to_celsius(-40) == -40.0
  assert fahrenheit_to_celsius(0) == -17.78
output: def fahrenheit_to_celsius(fahrenheit):
      return round((fahrenheit - 32) * 5 / 9, 2)