input: Write a function to convert the given temperature from Celsius to Fahrenheit. The function should take a single parameter representing the temperature in Celsius and return the equivalent temperature in Fahrenheit.
  
  assert celsius_to_fahrenheit(0)==32.0
  assert celsius_to_fahrenheit(100)==212.0
  assert celsius_to_fahrenheit(-40)==-40.0
  assert celsius_to_fahrenheit(25)==77.0
  assert celsius_to_fahrenheit(37)==98.6
output: def celsius_to_fahrenheit(celsius):
      return celsius * 9/5 + 32