import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in =new Scanner(System.in);
        String nums1,nums2;
        nums1=in.next();
        nums2=in.next();
        Main k=new Main();
        String ans=k.multiply(nums1,nums2);
        System.out.println(ans);
    }
    public String multiply(String nums1, String nums2) {
        if (nums1.equals("0") || nums2.equals("0")) {
            return "0";
        }
        int m = nums1.length();
        int n = nums2.length();
        int[] ansArr = new int[n + m];
        for (int i = m - 1; i >= 0; i--) {
            int x = nums1.charAt(i) - '0';
            for (int j = n - 1; j >= 0; j--) {
                int y = nums2.charAt(j) - '0';
                ansArr[i + j + 1] += x * y;
            }
        }
        for (int i = m + n - 1; i > 0; i--) {
            ansArr[i - 1] += ansArr[i] / 10;
            ansArr[i] %= 10;
        }
        int index = ansArr[0] == 0 ? 1 : 0;
        StringBuffer ans = new StringBuffer();
        while (index < m + n) {
            ans.append(ansArr[index]);
            index++;
        }
        return ans.toString();
    }
}