题解 | 【模板】牛牛学说话之-浮点数

import java.util.*;
public class Main{
    public static void main(String[] args){
        Double a;
        Scanner scan = new Scanner(System.in);
        a = scan.nextDouble();
        // String temp = String.format("%.6f",a);
        String temp = a.toString();
        if(temp.contains(".")){
            System.out.print(temp+"000");
        }
        else{
            System.out.print(temp+".000");
        }
    }
}