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

L = [(P, A), (Q, B), (R, C), (S, D)]
qt = sorted(L)
toutle = 0

def TAndQ(qt,T,toutle):
    if not qt:
        return toutle
    first_key, first_value = qt[0]
    
    if first_key * first_value <= T:
        toutle = toutle + first_value
        T = T - first_key * first_value
        qt.pop(0)
        return TAndQ(qt,T,toutle)
    else :
        toutle = toutle + T // first_key
        return toutle
    
toutle = TAndQ(qt, T, toutle)
print(toutle)