private int getLowerPiece(int piece) {
		int lowerPiece;
		switch (piece) {
		case 200:
			lowerPiece = 100;
			break;
		case 100:
			lowerPiece = 50;
			break;
		case 50:
			lowerPiece = 20;
			break;
		case 20:
			lowerPiece = 10;
			break;
		case 10:
			lowerPiece = 5;
			break;
		case 5:
			lowerPiece = 2;
			break;
		case 2:
			lowerPiece = 1;
			break;
		case 1:
			lowerPiece = 1;
			break;
		default:
			lowerPiece = 1;
		}

		return lowerPiece;
	}