package me.yukicoder.lv1;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigDecimal;


public class No0552 {
	public static void main(String[] args) {
		try (BufferedReader br = new BufferedReader(new InputStreamReader(System.in))) {
			long a = Long.parseLong(br.readLine());

			BigDecimal ans = new BigDecimal(a).multiply(BigDecimal.valueOf(10));
			System.out.println(ans);

		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}