/* -*- coding: utf-8 -*-
 *
 * 754.cc:  No.754 畳み込みの和 - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_N = 100000;
const int MOD = 1000000007;

/* typedef */

typedef long long ll;

/* global variables */

int as[MAX_N + 1], bs[MAX_N + 1], asums[MAX_N + 2];

/* subroutines */

/* main */

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

  for (int i = 0; i <= n; i++)
    scanf("%d", as + i), asums[i + 1] = (asums[i] + as[i]) % MOD;
  for (int i = 0; i <= n; i++)
    scanf("%d", bs + i);

  int c = 0;
  for (int i = 0; i <= n; i++)
    c = (c + (ll)asums[i + 1] * bs[n - i] % MOD) % MOD;
  printf("%d\n", c);
  return 0;
}