#include<stdio.h>
int gcd(int a, int b)
{
	int r = a % b;
	while (r > 0)
	{
		a = b;
		b = r;
		r = a % b;
	}
	return b;
}
int main()
{
	int a, b, c, d, e;
	scanf("%d %d %d %d %d", &a, &b, &c, &d, &e);
	int l = (a + c) / gcd(a + b, c + d) * (c + d);
	int i, cnt = 0;
	for (i = 1; i <= l; i++)
		if (1 <= i % (a + b) && i % (a + b) <= a && 1 <= i % (c + d) && i % (c + d) <= c)
			cnt++;
	cnt *= e / l;
	for (i = 1; i <= e % l; i++)
		if (1 <= i % (a + b) && i % (a + b) <= a && 1 <= i % (c + d) && i % (c + d) <= c)
			cnt++;
	printf("%d\n", cnt);
	return 0;
}