private void drawNumberInsideCardArea(Graphics g, Card aFaceDownCard) {
		Rectangle cardArea = aFaceDownCard.getCardArea();
		int numberLeftInPack = cardStack.size();
		g.setFont(new Font("Times", Font.BOLD, 48));
		if (numberLeftInPack < 10) {
			g.drawString("" + numberLeftInPack,
					cardArea.x + cardArea.width / 3, cardArea.y
							+ cardArea.height * 2 / 3);
		} else {
			g.drawString("" + numberLeftInPack,
					cardArea.x + cardArea.width / 6, cardArea.y
							+ cardArea.height * 2 / 3);
		}
	}