java double shit storm...

import java.math.BigDecimal;

/**
 * Created by todor on 20.03.2017 г..
 */
public class Dummy2 {
    public static void main(String[] args) {
        double max =     9000000000000086504520987234.450000; // zakryglq do pyrvite 16 cifri
        String maxStr = "9000000000000086504520987234.450000";
        BigDecimal bd = new BigDecimal(maxStr).setScale(6, BigDecimal.ROUND_HALF_UP);
        System.out.printf("1.  %f%n", max);
        System.out.printf("2.  %s%n", maxStr);
        System.out.printf("3.  %s%n", bd);

        System.out.printf("4.  %f%n", max / 10);
        System.out.printf("5.  %f%n", max * 0.1);
        System.out.printf("6.  %f%n", max * 10 / 100 );

        // dolniqt BigDecmial ne izliza pochti vinagi
        System.out.printf("7.  %s%n", bd.multiply(new BigDecimal(0.1)).setScale(6, BigDecimal.ROUND_HALF_UP));

        // dolnite BigDecmial-i sa identichni vinagi i davat veren rezultat
        System.out.printf("8.  %s%n", bd.multiply(new BigDecimal("0.1")).setScale(6, BigDecimal.ROUND_HALF_UP));
        System.out.printf("9.  %s%n", bd.multiply(new BigDecimal(10)).divide(new BigDecimal(100), 6, BigDecimal.ROUND_HALF_UP));
        System.out.printf("10. %s%n", bd.multiply(new BigDecimal("10")).divide(new BigDecimal("100"), 6, BigDecimal.ROUND_HALF_UP));
        System.out.println();
        //

        max =     986504520987234.450000; // zakryglq do pyrvite 16 cifri nezavisimo dali sa v drobnata chast
        maxStr = "986504520987234.450000";
        bd = new BigDecimal(maxStr).setScale(6, BigDecimal.ROUND_HALF_UP);
        System.out.printf("1.  %f%n", max);
        System.out.printf("2.  %s%n", maxStr);
        System.out.printf("3.  %s%n", bd);

        System.out.printf("4.  %f%n", max / 10);
        System.out.printf("5.  %f%n", max * 0.1);
        System.out.printf("6.  %f%n", max * 10 / 100 );

        // dolniqt BigDecmial ne izliza pochti vinagi
        System.out.printf("7.  %s%n", bd.multiply(new BigDecimal(0.1)).setScale(6, BigDecimal.ROUND_HALF_UP));

        // dolnite BigDecmial-i sa identichni vinagi i davat veren rezultat
        System.out.printf("8.  %s%n", bd.multiply(new BigDecimal("0.1")).setScale(6, BigDecimal.ROUND_HALF_UP));
        System.out.printf("9.  %s%n", bd.multiply(new BigDecimal(10)).divide(new BigDecimal(100), 6, BigDecimal.ROUND_HALF_UP));
        System.out.printf("10. %s%n", bd.multiply(new BigDecimal("10")).divide(new BigDecimal("100"), 6, BigDecimal.ROUND_HALF_UP));
        System.out.println();

        //

        max =     98654520987234.450000; // pri 16 cifri vsichko izliza osven ediniqt BigDecmial
        maxStr = "98654520987234.450000";
        bd = new BigDecimal(maxStr).setScale(6, BigDecimal.ROUND_HALF_UP);
        System.out.printf("1.  %f%n", max);
        System.out.printf("2.  %s%n", maxStr);
        System.out.printf("3.  %s%n", bd);

        System.out.printf("4.  %f%n", max / 10);
        System.out.printf("5.  %f%n", max * 0.1);
        System.out.printf("6.  %f%n", max * 10 / 100 );

        // dolniqt BigDecmial ne izliza pochti vinagi
        System.out.printf("7.  %s%n", bd.multiply(new BigDecimal(0.1)).setScale(6, BigDecimal.ROUND_HALF_UP));

        // dolnite BigDecmial-i sa identichni vinagi i davat veren rezultat
        System.out.printf("8.  %s%n", bd.multiply(new BigDecimal("0.1")).setScale(6, BigDecimal.ROUND_HALF_UP));
        System.out.printf("9.  %s%n", bd.multiply(new BigDecimal(10)).divide(new BigDecimal(100), 6, BigDecimal.ROUND_HALF_UP));
        System.out.printf("10. %s%n", bd.multiply(new BigDecimal("10")).divide(new BigDecimal("100"), 6, BigDecimal.ROUND_HALF_UP));
        System.out.println();
    }
}