A = list(map(int, input().split()))
B = list(map(int, input().split()))
C = B[:4]
t = B[-1]

D = []
for k, v in zip(A,B):
    D.append([k, v])

sortedD = sorted(D, key=lambda x: x[1])

ans = 0
for i in range(4):
    if t > D[i][0] * D[i][1]:
        t -= D[i][0] * D[i][1]
        ans += D[i][0]
    else:
        ans += t // D[i][1]
        break

print(ans)