代码:
1 import java.util.*;
2 public class Main {
3 public static void main (String [] args) {
4 Scanner s=new Scanner(System.in);
5 double y=s.nextInt();
6 double g=0;
7 g=y*1.6;
8 System.out.println(String.format("%.2f",g));
9 }
10 }