A,B,C,D=map(int,input().split())
P,Q,R,S,T=map(int,input().split())
[(P,A),(Q,B),(R,C),(S,D)] = sorted([(P,A),(Q,B),(R,C),(S,D)])
if P*A>=T:
    print(T//P)
elif P*A+Q*B>=T:
    print(A+(T-P*A)//Q)
elif P*A+Q*B+R*C>=T:
    print(A+B+(T-P*A-Q*B)//R)
elif P*A+Q*B+R*C+S*D>=T:
    print(A+B+C+(T-P*A-Q*B-R*C)//S)
else:
    print(A+B+C+D)