#include <stdio.h>


double convert_to_celcius(double t)
{
  double result;

  result = (t-32.0)/9.0 * 5.0;
  return result;
}


int main()
{
  double number;
  double converted;

  while(1)
  {
    printf("please enter a temperature in Fahrenheit:\n");
    scanf("%lf", &number);

    if (number == 777.0)
    {
      break;
    }

    converted = convert_to_celcius(number);
    printf("%lf in Fahrenheit equals %lf in Celsius\n\n", number, converted);
  }
}