public class Solution {
    public static int[] multiplyByScalar(int[] numbers, int scalar) {
        int n_multiplicado = 0;
        ArrayList<Integer> numbers_list = new ArrayList<>();

        for (int n : numbers) {
            n_multiplicado = n * scalar;
            numbers_list.add(n_multiplicado);
        }
        int[] result = numbers_list.stream().mapToInt(Integer::intValue).toArray();
        return result;
    }
}