#include <iostream>
#include <iomanip>

using namespace std;

int main()
{
	// 1. decl.
	float f, c;
	cout << fixed << showpoint << setprecision(1);
	
	// 2. input
	cout << "Input the temperature in F - ";
	cin >> f;

	while (f > 0)
	{
	
		// 3. computing
		c = 5.0 / 9 * (f - 32);

		// 4. out
		cout << "The temperature in F - " << f << " is equal to " << c 
		<< endl;
	
		cout << "Input the temperature in F - ";
        	cin >> f;   
	}
	return 0;
}