A,B,C,D,E = map(int,input().split())
time = 1
count = 1
flg = False
skip = (A+B)*(C+D)
while time < min(skip,E):
  if 0 <= time%(A+B) < A and 0 <= time%(C+D) < C:
    count += 1
  time += 1
ans = count*(max(skip,E)//skip)
print(ans)