import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.InputStream;
import java.nio.CharBuffer;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.lang.StringBuilder;
import java.lang.String;
import java.io.*;

public class FastScanner {
    private InputStreamReader in;
    private String buffer;
    private int readerPtr;

    public FastScanner(InputStream stream, String enccoding) throws UnsupportedEncodingException {
        in = new InputStreamReader(stream, enccoding);
        buffer = "";
        readerPtr = 0;
    }

    public void fflush() {
        buffer = "";
        readerPtr = 0;
    }
    public boolean hasNextInt()
    {
        if (readerPtr != buffer.length())
            return true;
        fflush();
        char a = 'a';
        boolean flag = false;
        while (!Character.isWhitespace(a))
        {
            try
            {
                a = (char)in.read();
                if (Character.isWhitespace(a))
                    if (flag)
                        return true;
                    else
                        return false;
                buffer += a;
                flag = true;
            } catch (IOException e)
            {
                e.printStackTrace();
                return false;
            }
        }
        return true;
    }
    public  int nextInt()
    {
        return Integer.parseInt(buffer);
    }
    /*public boolean hasNextLine() throws IOException {
        return hasNext();
    }

    public String nextLine() throws IOException {
        StringBuilder result = new StringBuilder("");
        while (hasNext()) {
            char ch = next();
            if (ch == '\n')
                break;
            result.append(ch);
        }
        return result.toString();
    }

    public void close() {
        try {
            in.close();
        } catch (IOException e) {
            System.err.println("Scanner is not closed");
        }
    }*/
}

public class Main
{
    public static void main(String[] args) {
        FastScanner fs = new FastScanner(System.in,"KOI8-R");
        while (fs.hasNextInt())
            System.out.println(fs.nextInt() * 10);
    }
}