a,b,c,d,e = map(int, input().split())

import math
from functools import reduce
def lcm_base(x, y):
    return (x * y) // math.gcd(x, y)

l = lcm_base(a+b, c+d)
s = ('1'*a+'0'*b)*(l//(a+b))
t = ('1'*c+'0'*d)*(l//(c+d))

cnt = 0
for i in range(l):
    if s[i] == '1' and t[i] == '1':
        cnt += 1

q, r = divmod(e, l)
ans = cnt*q
for i in range(r):
    if s[i] == '1' and t[i] == '1':
        ans += 1
print(ans)