import sys
input = sys.stdin.readline

from collections import Counter

mod=10**9+7

N=int(input())
A=list(map(int,input().split()))
B=list(map(int,input().split()))

C=Counter()

for i in range(N):
    a,b=A[i],B[i]

    if a==0:
        continue
    if a<0:
        a=-a
        b=-b

    C[a,b]+=a

MAX=max(C.values())

LIST=[]
for c in C:
    if C[c]==MAX:
        LIST.append(c)

ANS=min(LIST,key=lambda x:x[1]/x[0])

LANS=ANS[1]*pow(ANS[0],mod-2,mod)%mod

print(LANS)