#include<bits/stdc++.h>
using namespace std;
int main() {
	long long a[3];
	for (int i = 0;i < 3;i++) { cin >> a[i]; }
	sort(a, a+3);
	long long r = a[2] / a[0], c = a[0], b = a[2];
		while (r != 0) { a[2] = a[0];a[0] = r;r = a[2] % a[0]; }
	int m = c / a[0], n = b / a[0];
	cout << m << "/" << n << endl;





}