from math import gcd
from numpy import floor
A, B, C, D, E = map(int, input().split())

n = A + B
m = C + D
L = int(n*m/gcd(n, m))
y = int(floor(E/L))
z = E - y*L
  
i = 0
j = 0
l = 0
if E < L:
    X = E + 1
else:
    X = L + 1

if z > 0:
    for i in range(1, z + 1):
        if 0 < i % n <= A and 0 < i % m <= C:
            j += 1
        else:
            None
else:
    None

for k in range(i + 1, X):
    if 0 < k % n <= A and 0 < k % m <= C:
        l += 1
    else:
        None
    
print(j + y*(j+l))