Java 代码

import java.util.Scanner;
import java.text.DecimalFormat;

public class Main
{
   public static void main(String[] args)
   {
      Scanner cin=new Scanner(System.in);    
      double a=cin.nextDouble();
      double b=cin.nextDouble();
      double x=a*3.5/11+b*7.5/11;
      DecimalFormat df=new DecimalFormat("0.00000"); //保留五位小数
      System.out.println("MEDIA = "+df.format(x));
   }
}