#include <iostream>

using namespace std;
int cmmdc(int a,int b)
{
    int r;
    while (b)
    {
        r=a%b;
        a=b;
        b=r;
    }
    return a;
}
pair < int , int > p[10];
int main()
{
    int n;
    long long prod=1,a=0;
    cin>>n;
    for (int i=1;i<=n;i++)
    {
        cin>>p[i].first>>p[i].second;
        prod=prod*p[i].second;
    }
    for (int i=1;i<=n;i++)
    {
        a=a+p[i].first*(prod/p[i].second);
    }
    int l=cmmdc(a,prod);
    cout<<a/l<<" "<<prod/l;
    return 0;
}