input: Write a function to convert degrees Fahrenheit to degrees Celsius. The function should take a temperature in Fahrenheit as input and return the equivalent temperature in Celsius.
  
  def FahrenheitToCelsius(temp_fahrenheit):
      temp_celsius = (temp_fahrenheit - 32) * 5/9
      return temp_celsius
  
  assert FahrenheitToCelsius(32) == 0.0
  assert FahrenheitToCelsius(212) == 100.0
  assert FahrenheitToCelsius(-40) == -40.0
output: def FahrenheitToCelsius(temp_fahrenheit):
      temp_celsius = (temp_fahrenheit - 32) * 5/9
      return temp_celsius