import math
M1, S1, M2, S2, N = map(int, input().split())

T1 = M1 + S1
T2 = M2 + S2

def my_lcm(x, y):
    return (x * y) // math.gcd(x, y)

LCD = my_lcm(T1, T2)

dp = [0] * (LCD * 2)

i = 0
while i <= LCD:
    for j in range(M1):
        dp[i] += 1
        i += 1
    for j in range(S1):
        i += 1

i = 0
while i <= LCD:
    for j in range(M2):
        dp[i] += 1
        i += 1
    for j in range(S2):
        i += 1


if LCD < N:
    cnt = dp[:LCD].count(2)
    mod = N % LCD
    ans = cnt * (N // LCD) + dp[:mod].count(2)
else:
    ans = dp[:N].count(2)

print(ans)