#391 Fractii

#include <iostream>
using namespace std;

int main(){
    int n, a, b, p=0, q = 1;
    cin >> n;
    for(int i=1;i<=n;++i)
    {
        cin >> a >> b;
        p = a * q + b * p;
        q = b * q;
        int x = p, y = q, r;
        while(x % y != 0)
        {
            r = x % y;
            x = y;
            y = r;
        }
        p /= y, q /= y;
    }
    cout << p << " " << q;
    return 0;
}