package main

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

func main() {
	run()
}

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

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

	cs := make([]int, len(as)+len(bs))
	for ia, a := range as {
		for ib, b := range bs {
			// cs[ia+ib] = (cs[ia+ib] + a * b) % (10e9 + 7)
			cs[ia+ib] += a * b
		}
	}

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

	println(sumC)
}

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
}