//function to multiply them without using multiplication operator
import java.util.*;
import java.lang.*;
import java.io.*;
class RussianPeasant {
	// Function to multiply two
	// numbers using Russian Peasant method
	static int russianPeasant(int a, int b)
	{
		// initialize result
		int res = 0;

		// While second number doesn't become 1
		while (b > 0)
		{
			// If second number becomes odd,
			// add the first number to result
			if ((b & 1) != 0)
				res = res + a;
			// Double the first number
			// and halve the second number
			a = a << 1;
			b = b >> 1;
		}
		return res;
	}
		// driver program
	public static void main (String[] args)
	{
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();	
	System.out.println(russianPeasant(a,b));
		
	}
}