import math
A, B, C, D, E = map(int, input().split())
ab = A+B
cd = C+D
G = math.gcd(ab, cd)
L = ab*cd//G
ans = 0
for i in range(L):
    if 0<=i%ab<A and 0<=i%cd<C:
        ans+=1
cnt = E//L
ans *= cnt
for i in range(E%L):
    if 0<=i%ab<A and 0<=i%cd<C:
        ans+=1
print(ans)