import math
A, B, C, D, E = map(int, input().split())
L = math.lcm(A + B, C + D)
sho, amari = divmod(E, L)
cnt = 0
for i in range(L):
    sho1, amari1 = divmod(i, A + B)
    # amari1 が A未満だったら動いている
    sho2, amari2 = divmod(i, C + D)
    if amari1 < A and amari2 < C:
        cnt += 1

ans = cnt * sho
for i in range(amari):
    sho1, amari1 = divmod(i, A + B)
    sho2, amari2 = divmod(i, C + D)
    if amari1 < A and amari2 < C:
        ans += 1

print(ans)