#include<bits/stdc++.h>
#define int long long
using namespace std;
signed main(){
    string X;cin>>X;
    int f=X.end()-find(X.begin(),X.end(),'.')-1;
    if(f==-1)X+='.',f++;
    for(int i=f;i<8;i++)X+='0';
    X.erase(find(X.begin(),X.end(),'.'));
    int x=stoll(X),y=100000000;
    int n=gcd(x,y);
    x/=n;y/=n;
    cout<<x<<'/'<<y<<endl;
}