import java.math.*;

final public class Main
{
    public static void main(String[] args)
    {
        BigDecimal a = new BigDecimal(2);
        BigDecimal b = new BigDecimal(3);

        System.out.println(a.multiply(b));
        System.out.println(a.add(b));
        System.out.println(b.subtract(a));
        System.out.println(a.divide(b, 20, RoundingMode.HALF_UP));
    }
}