#define _USE_MATH_DEFINES
#include<iostream>
#include<vector>
#include<algorithm>
#include<cmath>
#include<string>
#include<iomanip>
#include<cassert>
#include<functional>

int main(){
	std::ios::sync_with_stdio(false);
	std::cin.tie(0);

	const long long subtract = 1000000007;
	int n;
	long long ans = 0;

	std::cin >> n;

	std::vector<long long> a(n + 1);
	std::vector<long long> b(n + 1);

	for (int i = 0; i < n + 1; i++){
		std::cin >> a[i];
	}
	for (int i = 0; i < n + 1; i++){
		std::cin >> b[i];
	}
	//入力終わり

	for (int i = 0; i < n + 1; i++){
		for (int j = 0; j < n + 1 - i; j++){
			ans += static_cast<long long>(a[i] * b[j] % subtract);
		}
	}

	std::cout << static_cast<long long>(ans % subtract) << '\n';

	return 0;
}