public void count(ActionEvent event) {
        labelForPB.setVisible(true);
        progressBar.setVisible(true);
        int firstNumber = Integer.parseInt(firstNumberInput.getText());
        int lastNumber = Integer.parseInt(lastNumberInput.getText());
        int multiNumber = Integer.parseInt(multiNumberInput.getText());
        Task task = new DataProcessingTask(firstNumber, lastNumber, multiNumber);
        progressBar.progressProperty().bind(task.progressProperty());
        Thread t = new Thread(task);
        if (!t.isAlive()) {
            t.start();
        } else {
            t.interrupt();
            t.start();
        }
    }