#include <bits/stdc++.h>
typedef long long int LL;
using namespace std;

const int N = 1e5+8;
const int MOD = 1e9+7;
/****************************************************/
int n;
int main(){
    // freopen("test_3.in","r",stdin);
    // freopen("test_3.out","w",stdout);

    int _ = 1,a,b;
    // for(scanf("%d",&_);_--;){
    while(~scanf("%d",&n)){
        LL ans = 1;
        for(int i=1;i<=n;i++){
            scanf("%d%d",&a,&b);
            ans = (ans * (a+b)) %MOD;
        }
        printf("%lld\n", ans);
    }
    return 0;
}