Rectangle Area (Java)

import java.util.Scanner;

public class RectangleArea01 {
    public static void main(String[] args){
        double a;
        double b;
        Scanner input = new Scanner(System.in);
        System.out.print("a = ");
        a = input.nextInt();
        System.out.print("b = ");
        b = input.nextInt();
        double sum = a * b;
        System.out.println("Sum = " + sum);
    }
}