#include <stdio.h>
#define MAX 10

int pair[MAX][2];

int gcd(int a , int b);
int lcm(int a , int b);

int gcd(int a , int b)
{
    if(a < b){
        int t = a;
        a = b;
        b = t;
    }

    return (a % b == 0) ? b : gcd(b , a%b);
}

int lcm(int a , int b)
{
    if(a < b){
        int t = a;
        a = b;
        b = t;
    }

    return (a*b) / gcd(a , b);
}

int main(void)
{
    int n;
    scanf("%d",&n);

    int i;
    for(i = 0 ; i < n ; i++){
        scanf("%d %d",&pair[i][0] ,&pair[i][1]);
    }

    int bottom = pair[0][1];
    for(i = 1 ; i < n ; i++){
        bottom = lcm(bottom , pair[i][1]);
    }

    int top = 0;
    for(i = 0 ; i < n ; i++){
        top += (pair[i][0] * (bottom / pair[i][1]));
    }

    int GCD = gcd(top , bottom);

    printf("%d %d\n",top / GCD,bottom / GCD);

    return 0;
}