#include<iostream>
using namespace std;
int n(int t,int ac){
if(t%ac==0)return ac;
return n(ac,t%ac);
}
int main(){
int s,o,q;
cin>>s>>o>>q;
int p=min(s,min(o,q));
int x=max(s,max(o,q));
int l=n(p,x);
cout<<p/l<<"/"<<x/l;
return 0;
}
// 7r37r17871818r68176r87637633178617
