#include<bits/stdc++.h>
using namespace std;
#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
typedef long long ll;
typedef vector<ll> vl;
typedef vector<vl>vvl;
typedef vector<vvl>vvvl;
typedef vector<vvvl>vvvvl;
typedef vector<vvvvl>vvvvvl;
typedef vector<int>vi;
typedef vector<vi>vvi;
typedef vector<vvi>vvvi;
typedef vector<vvvi>vvvvi;
typedef vector<vvvvi>vvvvvi;
typedef pair<ll,ll> P;

ll exp(ll n,ll r){if(r==0)return 1;return n*exp(n,r-1);}

int main(){
    string s;cin>>s;
    // ll a;cin>>a;
    // char c;cin>>c;
    bool bo=false;
    ll idx=-1;
    rep(i,s.size()){
        if(s[i]=='.')bo=true,idx=i;
    }
    if(!bo){
        cout<<s<<"/1"<<endl;
    }
    else {
        ll a=stoll(s.substr(0,idx));
        ll b=stoll(s.substr(idx+1));
        // ll b;cin>>b;
        ll bs=s.substr(idx+1).size();
        a=exp(10,bs)*a+b;
        b=exp(10,bs);
        // cout<<a<<" "<<b<<endl;
        ll g=__gcd(a,b);
        cout<<a/g<<"/"<<b/g<<endl;
    }
}