Why in this Java program the Doubles in a String Output have too many decimals?

[SzNZsolty]

In a solution to an exercise in the Book Art and Science of Java I had to write a program that converts Kilograms into the corresponding values in Pounds and Ounces.I wrote the program but when I try to convert say 1kg, the result the program gives me is:1 kg = 2 pounds and 3.200000000000006 ouncesNow my constants are 2.2 pounds per kg and 16 ounces per pound so 3.2 ounces is correct. But not with so many 0's and that 6 at the end freaks me out.Anyone know why this happens and how it can be solved? Thank you!Here's the code:\[code\]/** File: KgsLibras.java* Program that converts kilograms in pounds and ounces.*/import acm.program.*;public class KgsLibras extends ConsoleProgram {public void run () { println ("This program will convert kilograms in pounds and ounces"); double kgs = readDouble ("Insert kgs value: "); double libras = kgs * LIBRAS_POR_KG; double oncas = (libras - (int)libras) * ONCAS_POR_LIBRA; println ((int)libras + " libras" + " e " + oncas + " On?as."); }private static final double LIBRAS_POR_KG = 2.2;private static final int ONCAS_POR_LIBRA = 16;}\[/code\]