#include <iostream>

using namespace std;

#define mod 1000000007

long long fact[1000001];

long long power(long long x,long long n,long long mo)
{
    if (n == 0) {
        return 1;
    }
    long long pow = power(x, n / 2,mo)%mo;
    if (n & 1) {
        return ((((x%mo) * (pow%mo))%mo) * pow%mo)%mo;
    }
    return ((pow%mo) * (pow%mo))%mo;
}

int main()
{
    fact[0] = fact[1] = 1;
    for(int i = 2;i<=1e6;i++){
        fact[i]=fact[i-1]*i;
        fact[i]%=mod;
    }
    long long n,p = 0;
    cin>>n;
    int ar1[n],ar2[n];
    for(int i = 0;i<n;i++){
        cin>>ar1[i];
    }
    int fl = 1;
    int ans[n] = {0};
    for(int i = 0;i<n;i++){
        cin>>ar2[i];
        if(ar2[i]<ar1[i])fl = 0;
        if((ar2[i]-ar1[i])%(i+1)!=0)fl = 0;
        ans[i]=(ar2[i]-ar1[i])/(i+1);
        p+=(ar2[i]-ar1[i])/(i+1);
    }
    if(!fl){
        cout<<0<<"\n";
        return 0;
    }
    long long ba = 1;
    for(int i = 0;i<n;i++){
        ba*=fact[ans[i]]%mod;
        ba%=mod;
    }
    long long per = 1;
    for(int i = 1;i<=p;i++)per*=i,per%=mod;
    cout<<(per*power(ba,mod-2,mod))%mod;
    return 0;
}