#include <bits/stdc++.h>
using namespace std;
#if __has_include("all.hpp")
#include "all.hpp"
#else
#include <atcoder/all>
#endif
using namespace atcoder;
using mint =modint1000000007;
int main(void){
    int n;
    cin>>n;
    long long a[n],b[n];
    for(int i=0;i<n;i++)cin>>a[i];
    for(int i=0;i<n;i++)cin>>b[i];
    vector<pair<long double,pair<int,int>>>v;
    for(int i=0;i<n;i++){
        if(a[i]!=0){
            v.push_back({b[i]/(long double)a[i],{abs(a[i]),i}});
            // cout<<v[i].first<<endl;
        }
    }
    if(v.size()==1){
        int tmp=v[0].second.second;
        mint ans=b[tmp];
        ans/=a[tmp];
        cout<<ans.val()<<endl;
        return 0;
    }
    sort(v.begin(),v.end());
    long double mn=1e18;
    vector<long double>rv(v.size(),0);
    vector<long double>rrv(v.size(),0);
    long double sum1=0,sum2=0,sum3=0,sum4=0;
    for(int i=v.size()-1;i>=0;i--){
        v[i].first-=v[0].first;
        sum1+=v[i].first*v[i].second.first;
        sum3+=v[i].second.first;
    }
    long long tmp=0;
    // cout<<sum1<<" "<<sum2<<" "<<sum3<<" "<<sum4<<endl;
    for(int i=0;i<v.size();i++){
        if(sum1+sum2<mn){
            tmp=v[i].second.second;
            mn=sum1+sum2;
        }
        if(i!=v.size()-1){
            sum3-=v[i].second.first;
            sum1-=(v[i+1].first-v[i].first)*sum3;
            sum4+=v[i].second.first;
            sum2+=(v[i+1].first-v[i].first)*sum4;
        }
        // cout<<sum1<<" "<<sum2<<" "<<sum3<<" "<<sum4<<endl;
        // cout<<mn<<" "<<tmp<<"!"<<endl;
    }
    // for(int i=0;i<v.size()-1;i++){
    //     rv[i+1]=rv[i]+v[i+1].first*v[i+1].second.first;
    // }
    // for(int i=v.size()-1;i>=1;i--){
    //     rrv[i-1]=rrv[i]+(v[v.size()-1].first-v[i-1].first)*v[i-1].second.first;
    // }
    // for(int i=0;i<v.size();i++){
    //     cout<<v[i].first<<" "<<v[i].second.first<<" "<<v[i].second.second<<" "<<rv[i]<<" "<<rrv[i]<<endl;
    // }
    // long long tmp=0;
    // for(int i=0;i<v.size();i++){
    //     if(rv[i]+rrv[i]<mn){
    //         tmp=v[i].second.second;
    //         mn=rv[i]+rrv[i];
    //     }
    //     cout<<mn<<" "<<tmp<<"!"<<endl;
    // }
    
    mint ans=b[tmp];
    ans/=a[tmp];
    cout<<ans.val()<<endl;
    return 0;
}