#include<iostream>
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 1000010;
ll a[N];
int main()
{
	for(int i=1;i<=3;i++) scanf("%d",&a[i]);
	sort(a+1,a+3);
	 ll x=a[1];
	 ll y=a[3];
	 while(y%x)
	 {
	 	int t = y%x;
	 	y= x;
	 	x = t;
	  } 
	printf("%d/%d",a[1]/x,a[3]/x);
	return 0;
}