import sys
sys.setrecursionlimit(10 ** 6)
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LC(): return list(input())
def IC(): return [int(c) for c in input()]
def MI(): return map(int, sys.stdin.readline().split())
INF = float('inf')
MOD = 10**9 + 7
def solve():
    A,B,C,D,E = MI()
    import math
    def my_lcm(x, y):
        return (x * y) // math.gcd(x, y)
    Loop = my_lcm(A+B,C+D)
    Same = 0
    for l in range(Loop):
        if(l%(A+B) <= A-1 and l%(C+D) <= C-1):
            Same+=1
    Ans = Same*(E//Loop)
    E = E - (E//Loop) * Loop#残り部分
    #print(Ans,E)
    for l in range(E):
        if(l%(A+B) <= A-1 and l%(C+D) <= C-1):
            Ans+=1
    print(Ans)
    return
solve()