#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef pair<ll,ll> P;
typedef modint1000000007 mint;
#define rep(i,a,b) for(ll i=a;i<b;i++)
#define rrep(i,a,b) for(ll i=a;i>=b;i--)
const ll inf=1e18;
string s;
ll p,q;
int main(void){
    cin.tie(0);
    ios::sync_with_stdio(0);
    cin>>s;
    rep(c,0,s.size()){
        if(s[c]=='.') q=1;
        else{
            p=p*10+(s[c]-'0');
            q*=10;
        }
    }
    if(q==0){
        q=1;
    }
    ll g=__gcd(p,q);
    p/=g;
    q/=g;
    cout<<p<<"/"<<q<<endl;

}