from math import gcd
A,B,C,D,E = map(int,input().split())
time,count = 1,1
F = gcd((A+B),(C+D))
while time < min(E,F):
  if 0 <= time%(A+B) < A and 0 <= time%(C+D) < C:
    count += 1
  time += 1
print(count*(E//time))