import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int d = sc.nextInt();
        int e = sc.nextInt();
        int ab = a + b;
        int cd = c + d;
        int lcm = getLCM(ab, cd);
        int[] imos = new int[lcm];
        for (int i = 0; i * ab < lcm; i++) {
            imos[i * ab]++;
            imos[i * ab + a]--;
        }
        for (int i = 0; i * cd < lcm; i++) {
            imos[i * cd]++;
            imos[i * cd + c]--;
        }
        int base = 1;
        for (int i = 1; i < lcm; i++) {
            imos[i] += imos[i - 1];
            base += imos[i] / 2;
        }
        int ans = base * (e / lcm);
        for (int i = 0; i < e % lcm; i++) {
            ans += imos[i] / 2;
        }
        System.out.println(ans);
    }
    
    static int getLCM(int x, int y) {
        return x / getGCD(x, y) * y;
    }
    
    static int getGCD(int x, int y) {
        if (x % y == 0) {
            return y;
        } else {
            return getGCD(y, x % y);
        }
    }
}

class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public String next() throws Exception {
        if (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
}