How to format?

Here is the code:

Code :

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import java.util.Scanner;
 
public class Problem2 {
    public static void main (String []args){
 // Scanner
        Scanner scan = new Scanner(System.in);
 
 // Declorations
        double kilograms = 1;
 
 
        System.out.println("Kilograms\tPounds");
 
// For loop
      for (int i = 1; i <= 199; i += 2) {
 
 System.out.println(i + "                " + i * 2.2);
 
    }
 
}
 
 }

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The answers give me two columns, but the problem is sometimes there are 10 zeros after the decimal so for the third answer it is 6.6000000000 etc. I just want to use one character after the decimal and I don't know how. I have tried the printf and using %d,f etc but that didn't work :/

How to Format a double to 2 decimal places