Locale-invariant, method, placeholder (2 digits)

import java.util.Locale;    // for Locale set
import java.util.Scanner;

public class GetAverage {   // method
    public static double findAverage(double numbA, double numbB, double numbC) {
        double average = 0;
        average = (numbA + numbB + numbC) / 3;
        return average;
    }

    public static void main(String[] args) {
        Locale.setDefault(Locale.ROOT);     // like invariant culture in c#
        Scanner input = new Scanner(System.in);
        double numb1 = input.nextDouble();
        double numb2 = input.nextDouble();
        double numb3 = input.nextDouble();
        double average = findAverage(numb1, numb2, numb3);

        System.out.println(String.format("%.2f",average));  // placeholder --> 2 digits after decimal
    }
}