import std.algorithm;
import std.array;
import std.ascii;
import std.bigint;
import std.complex;
import std.container;
import std.conv;
import std.functional;
import std.math;
import std.range;
import std.stdio;
import std.string;
import std.typecons;

auto readInts() {
	return array(map!(to!int)(readln().strip().split()));
}
auto readInt() {
	return readInts()[0];
}
auto readLongs() {
	return array(map!(to!long)(readln().strip().split()));
}
auto readLong() {
	return readLongs()[0];
}

void readlnTo(T...)(ref T t) {
    auto s = readln().split();
    assert(s.length == t.length);
    foreach(ref ti; t) {
        ti = s[0].to!(typeof(ti));
        s = s[1..$];
    }
}

const real eps = 1e-10;
const long p = 1_000_000_000 + 7;

void main(){
    auto N = readInt();
    auto T = readLongs();
    auto A = readLongs();
    T = 0 ~ T ~ T.back;
    A = A[0] ~ A ~ 0;
    long ans = 1;
    foreach(i; iota(1,N+1)) {
        long hMinT = 1;
        long hMaxT = T[i];
        if(T[i-1] < T[i]) {
            hMinT = T[i];
        }
        long hMinA = 1;
        long hMaxA = A[i];
        if(A[i] > A[i+1]) {
            hMinA = A[i];
        }
        ans *= max(0, (min(hMaxT, hMaxA) - max(hMinT, hMinA) + 1));
        ans %= p;
    }
    writeln(ans);
}

