ab y todo eso xd

public class Campus {

    public static void main(String[] args) {
        System.out.println("a");
        double a = new java.util.Scanner(System.in).nextDouble();
        System.out.println("b");
        double b = new java.util.Scanner(System.in).nextDouble();
        System.out.println(a + " + " + b + " = " + (a + b));
        System.out.println(a + " - " + b + " = " + (a - b));
        System.out.println(a + " x " + b + " = " + (a * b));
        System.out.println(a + " / " + b + " = " + (a / b));
    }
}