//	CS 212 CS II Assignment 3
//	Due: Mon. Feb 28, 2011
//
//	File Name: assign3_fractions.cpp
//	Author: Abby Jamgochian
//	Instructor: Dr. Wang
//
//	Compile: g++ assign3_fractions.cpp
//	Run:	./a.out < out3.txt
//
//	Goal: The program will read a file with fractions in the order of 
//		first fraction, operation, second fraction and output the
//		answer and the problem to another file.

#include <iostream>

using namespace std;

class Fraction
{	int nume;
	int denom;
public:
	Fraction()
	{	nume = 0;
		denom = 1;
	}
	Fraction(int n, int d)
	{	nume = n;
		denom = d;
	}
	void Set(int n, int d)
	{	nume = n;
		denom = d;
	}
	void Print() const
	{	cout << nume << "/" << denom;	}
	Fraction operator+(Fraction x)
	{	Fraction ans;
		ans.nume = nume * x.denom + denom * x.nume;
		ans.denom = denom * x.denom;
		return ans;
	}
	Fraction operator-(Fraction x)
	{	Fraction ans;
		ans.nume = nume * x.denom - denom * x.nume;
		ans.denom = denom * x.denom;
		return ans;
	}
	Fraction operator*(Fraction x)
	{	Fraction ans;
		ans.nume = nume * x.nume;
		ans.denom = denom * x.denom;
		return ans;
	}
	Fraction operator/(Fraction x)
	{	Fraction ans;
		ans.nume = nume * x.denom;
		ans.denom = denom * x.nume;
		return ans;
	}
};
/*
int main()
{
	Fraction a, b, c;
	Fraction d, e, f;
	int an, ad, bn, bd;
	cout << "The first fraction (nume, deno); ";
	cin >> an >> ad;
	cout << "The second fraction (nume, deno); ";
	cin >> bn >> bd;
	a.Set(an, ad);
	b.Set(bn, bd);

	c = a.Addition(b);
	e = a.Multiplication(b);
	a.Print();
	cout << " + ";
	b.Print();
	cout << " = ";
	c.Print();
	cout << "\n";
	a.Print();
	cout << " * ";
	b.Print();
	cout << " = ";
	e.Print();

	return 0;
}*/

int main()
{
	int a1, b1;
	int a2, b2;
	char dummy, op;

	cin >> a1 >> dummy >> b1;
	cin >> op;
	cin >> a2 >> dummy >> b2;

	while(cin)
	{
	       	 Fraction f1, f2, ans;
       		 f1.Set(a1, b1);
       		 f2.Set(a2, b2);
		

		if(op == '+')	ans = f1 + f2;
		if(op == '-')	ans = f1 - f2;
		if(op == '*')	ans = f1 * f2;
		if(op == '/')	ans = f1 / f2;

		cin >> a1 >> dummy >> b1;
		cin >> op;
		cin >> a2 >> dummy >> b2;

		f1.Print();
		cout << " " << op << " ";
		f2.Print();
		cout << " = ";
		ans.Print();
		cout << "\n";

		cin >> a1 >> dummy >> b1;
		cin >> op;
		cin >> a2 >> dummy >> b2;
	}

	cout << "\n\nAll done.\n\n";
	return 0;
}