public void operation() {
		lugeja++;
		if (lugeja == 1) {
			ajutnumber = number;
			strnumber = "";
			number = 0;
		} else {
			if (syndmus == "+")
				ajutnumber += number;
			else if (syndmus == "-")
				ajutnumber -= number;
			else if (syndmus == "*")
				ajutnumber = ajutnumber * number;
			else if (syndmus == "/")
				ajutnumber = ajutnumber / number;
			ajutstrnum = Double.toString(ajutnumber);
			g.setColor(Color.white);
			tSumma.setText(ajutstrnum);
			strnumber = "";
			number = 0;

		}
	}