menghitung aritmatika pada program java

public class Aritmatika
{
  public static void main(String args[])
  {
    System.out.println("1 + 2 = "+(1+2));
    System.out.println("3 * 2 = "+(3*2));
    System.out.println("7 / 3 = "+(7/3));
    System.out.println("3 - 2 = "+(3-2));
    System.out.println("1 % 3 = "+(1%3));
    System.out.println("");
    System.out.println("1 +2 * 3 = "+(1+2*3));
    System.out.println("1 + 2 / 2 = "+(1+2/2));
    System.out.println("9 - 2 % 2 = "+(9-2%2));
 }
}
output