#include<bits/stdc++.h>
using namespace std;
int main() {
	int a,b,c;
	cin>>a>>b>>c;
	cout<<min({a,b,c})/__gcd(max({a,b,c}),min({a,b,c}))<<'/'<<max({a,b,c})/__gcd(max({a,b,c}),min({a,b,c}));
    return 0;
}