from math import gcd

a, b, c, d, e = map(int, input().split())
x = a+b
y = c+d
cycle = x*y//gcd(x, y)

memo1 = [0]*cycle

pos = 0
for i in range(cycle//x):
    for j in range(a):
        memo1[pos] = 1
        pos += 1
    for j in range(b):
        pos += 1
memo2 = [0]*cycle
pos = 0
for i in range(cycle//y):
    for j in range(c):
        memo2[pos] = 1
        pos += 1
    for j in range(d):
        pos += 1

memo = [0]*cycle

for i in range(cycle):
    if memo1[i] == memo2[i] and memo1[i] == 1:
        memo[i] = 1

cnt = sum(memo)

q, r = divmod(e, cycle)
res = q*cnt
for i in range(r):
    if memo[i]:
        res += 1
print(res)