import sys
input = sys.stdin.readline

A,B,C,D=map(int,input().split())
P,Q,R,S,T=map(int,input().split())

ANS=0

L=[(P,A),(Q,B),(R,C),(S,D)]

L.sort()

for x,y in L:
    if T>0:
        k=min(T//x,y)

        ANS+=k
        T-=k*x

print(ANS)