#include <iostream>

using namespace std;

struct fracType
{
	int nume;
	int deno;
};

fracType multi( fracType, fracType );

int main()
{
	// declare obj
	fracType x, y, z;
	fracType s, w;	
	
	// input
	x.nume = 2;
	x.deno = 3;
	y.nume = 4;
	y.deno = 5;

	s.nume = 1;
	s.deno = 2;

	z = multi ( x, y );
	w = multi ( s, z );

	cout << z.nume << "/" << z.deno << endl;
	cout << w.nume << "/" << w.deno << endl;

	return 0;
}

fracType multi ( fracType a, fracType b )
{
	fracType temp;
	temp.nume = a.nume * b.nume;
        temp.deno = a.deno * b.deno;
	return temp;
}