#include <iostream>
using namespace std;
int glc(long long a, long long b) {
    int n = 0;
    long long c = 1;
    while(n == 1) {
    	c = a % b;
        while(1 > 0) {
            n = 1;
            if(a % c == 0 && b % c == 0) {
                break;
            }
            c = a % c;
            c = b % c;
        }
    }
    return c;
}
int main () {
    long long a, b, c;
    cin>>a >>b >>c;
    int sum = a + b + c;
    int minl = a;
    if (minl > b) minl = b;
    if (minl > c) minl = c;
    int maxl = a;
    if(maxl < b) maxl = b;
    if(maxl < c) maxl = c;
    int g = glc(minl, maxl);
    minl /= g;
    maxl /= g;
    cout<<minl <<"/" <<maxl;
    return 0;
}