public class ParameterDemo {	
	public static double add(double x, double y) {	
		double result = x + y;	
		return result;	
	}	
	
	public static double multiply(double x, double y) {	
		x = x * y;	
		return x;	
	}	
	
	public static void main(String[] args) {	
		double a = 8, b = 11;
	
		double sum = add(a, b);	
		System.out.println(a + " + " + b + " = " + sum);	
	
		double product = multiply(a, b);	
		System.out.println(a + " * " + b + " = " + product);	
	}	
}