import sys
from math import gcd
sys.setrecursionlimit(10**7)
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int,sys.stdin.readline().rstrip().split())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))
def LI2(): return list(map(int,sys.stdin.readline().rstrip()))
def S(): return sys.stdin.readline().rstrip()
def LS(): return list(sys.stdin.readline().rstrip().split())
def LS2(): return list(sys.stdin.readline().rstrip())


A,B,C,D,E = MI()

X = (A+B)*(C+D)//gcd(A+B,C+D)
Y = [0]*X
for i in range(X):
    r = i % (A+B)
    s = i % (C+D)
    if r < A and s < C:
        Y[i] = 1

q,r = divmod(E,X)
ans = q*sum(Y)+sum(Y[:r])
print(ans)