#include<bits/stdc++.h>
using namespace std;
int main()
{long long a,b,c,x,y,t,i;
 cin>>a>>b>>c;
 x=max(max(a,b),c);
 y=min(min(a,b),c);
 for(i=y;i>=1;i--)
  {if(y%i==0&&x%i==0)
   t=i;
   break;
  }
 x=x/t;y=y/t;
 cout<<y<<"/"<<x;
return 0;
}