def gcd(a, b):
    while b: a, b = b, a % b
    return abs(a)

a, b, c, d, e = map(int, input().split())
m1 = a + b
m2 = c + d
m = m1 * m2 // gcd(m1, m2)
r = e % m
ans = 0
for i in range(m):
    if i % m1 < a and i % m2 < c:
        ans += 1
ans *= e // m
for i in range(r):
    if i % m1 < a and i % m2 < c:
        ans += 1
print(ans)