A, B, C, D = map(int, input().split())
P, Q, R, S, T = map(int, input().split())
tmp = [(P, A), (Q, B), (R, C), (S, D)]
t = 0
tmp.sort()
ans = 0
for i, j in tmp:
    k = (T - t) // i
    if k > j:
        k = j
    t += i * k
    ans += k
print(ans)