@Test
	public void test_mult_skalar() {
		int a = 2;
		int b = 3;
		int skalar = -4;
		Matrix m1 = new MatrixArrayList(a, b);
		Matrix m2 = new MatrixArrayList(a, b);

		for (int i = 1; i <= a; i++) {
			for (int j = 1; j <= b; j++)
				m1.insert(i, j, (double) (2 * i - j));
		}

		for (int i = 1; i <= a; i++) {
			for (int j = 1; j <= b; j++)
				m2.insert(i, j, (double) ((2 * i - j) * skalar));
		}

		assertEquals(m1.mul(skalar), m2);
	}