package main

import (
	"bufio"
	"os"
	"strconv"
)

func main() {
	run()
}

func run() {
	setSpace()
	N := readN()
	dim := N + 1
	as := make([]int, dim)
	for i := 0; i < dim; i++ {
		a := readN()
		as[i] = a
	}

	cs := make([]int, 2*dim)
	for ib := 0; ib < dim; ib++ {
		b := readN()
		for ia := 0; ia < dim; ia++ {
			cs[ia+ib] += as[ia] * b
		}
	}

	// fmt.Printf("debug: %v\n", cs)

	// \sum_{i=0}^n{ c_i }
	sumC := 0
	for i := 0; i < dim; i++ {
		sumC = (sumC + cs[i]) % (1e9 + 7)
	}
	println(sumC)
}

// ------以下、ユーティリティ------

var sc = bufio.NewScanner(os.Stdin)

func setSpace() {
	sc.Split(bufio.ScanWords)
}

func read() string {
	sc.Scan()
	return sc.Text()
}

func readN() int {
	n, err := strconv.Atoi(read())
	if err != nil {
		panic(err)
	}
	return n
}