import sys, time, random
from collections import deque, Counter, defaultdict
def debug(*x):print('debug:',*x, file=sys.stderr)
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
mi = lambda: map(int, input().split())
li = lambda: list(mi())
inf = 2 ** 61 - 1
mod = 998244353

a, b, c, d = mi()

p, q, r, s, t = mi()

A = [(a, p), (b, q), (c, r), (d, s)]
A.sort(key=lambda x: x[1])

ans = 0

for u, v in A:
    cnt = min(u, t // v)
    ans += cnt
    t -= cnt * v
    
print(ans)