import collections
import decimal
import math
import sys
import time

#mod = 1_000_000_007
def resolve():
    a,b,c,d,e  = int1d()
    gcd = math.gcd(a+b,c+d)
    lcm = (a+b)*(c+d)//gcd
    div,mod = divmod(e,lcm)
    rest = 0
    loop = 0
    for i in range(lcm):
        if mod==i: rest = loop
        if i%(a+b)<a and i%(c+d)<c: loop += 1
    
    print(div*loop+rest)

#region MyLibrary
#region Input
def str1d():return sys.stdin.read().splitlines()
def int1d():return list(map(int, sys.stdin.read().split()))
def float1d():return list(map(float,sys.stdin.read().split()))
def dec1d():return list(map(decimal.Decimal,sys.stdin.read().split()))
def str2d():return [list(s.split()) for s in str1d()]
def int2d():return [list(map(int,s.split())) for s in str1d()]
def float2d():return [list(map(float,s.split())) for s in str1d()]
def dec2d():return [list(map(decimal.Decimal,s.split())) for s in str1d()]
#endregion
resolve()