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

class Main56 {
	
	public static void main (String[] args) throws IOException {
		BufferedReader br = 
			new BufferedReader(new InputStreamReader(System.in));
		
		String[] line = br.readLine().split(" ");
		int D = Integer.parseInt(line[0]);
		int P = Integer.parseInt(line[1]);
		
		System.out.println(D * (P + 100) / 100);
	}
}