#include <bits/stdc++.h>
using namespace std::literals::string_literals;
using i64 = std::int_fast64_t;
using std::cout;
using std::cerr;
using std::endl;
using std::cin;

template<typename T>
std::vector<T> make_v(size_t a){return std::vector<T>(a);}

template<typename T,typename... Ts>
auto make_v(size_t a,Ts... ts){
  return std::vector<decltype(make_v<T>(ts...))>(a,make_v<T>(ts...));
}

int main() {
	int a, b, c, d, e; scanf("%d%d%d%d%d", &a, &b, &c, &d, &e);

	int A = a + b, B = c + d, C = std::lcm(A, B), ans = 0;
	for(int i = 0; i < C; i++) if((i % A < a) and (i % B < c)) ans++;
	ans *= e / C;
	for(int i = 0; i < e % C; i++) if((i % A < a) and (i % B < c)) ans++;

	printf("%lld\n", ans);
	return 0;
}