#include <bits/stdc++.h>
using namespace std;
const long long MOD = 1000000007;
array<array<long long, 3>, 3> matmul(array<array<long long, 3>, 3> A, array<array<long long, 3>, 3> B){
	array<array<long long, 3>, 3> ans = {array<long long, 3>{0, 0, 0}, array<long long, 3>{0, 0, 0}, array<long long, 3>{0, 0, 0}};
  for (int i = 0; i < 3; i++){
		for (int j = 0; j < 3; j++){
			for (int k = 0; k < 3; k++){
				ans[i][k] += A[i][j] * B[j][k];
				ans[i][k] %= MOD;
			}
		}
	}
	return ans;
}
array<array<long long, 3>, 3> matexp(array<array<long long, 3>, 3> A, long long b){
	array<array<long long, 3>, 3> ans = {array<long long, 3>{1, 0, 0}, array<long long, 3>{0, 1, 0}, array<long long, 3>{0, 0, 1}};
	while (b > 0){
		if (b % 2 == 1){
			ans = matmul(ans, A);
		}
		A = matmul(A, A);
		b /= 2;
	}
	return ans;
}
int main(){
  int L;
  cin >> L;
  vector<int> P(L), e(L);
  for (int i = 0; i < L; i++){
    cin >> P[i] >> e[i];
  }
  long long ans = 1;
  for (int i = 0; i < L; i++){
    array<array<long long, 3>, 3> A = {array<long long, 3>{P[i], 1, 1}, array<long long, 3>{0, 1, 1}, array<long long, 3>{0, 0, 1}};
    A = matexp(A, e[i] + 1);
    ans *= A[0][2];
    ans %= MOD;
  }
  cout << ans << endl;
}