Is there a way to automatically add/update page numbers when spawning new pages through a button

Hello Everybody,

I may need help although I jave been searching a lot around but I still have problems:

I have created a fillable form in Pro DC, with a button to spawn additional pages on user side.

My button Works with the script: //"var a = this.getTemplate("NewNC");
a.spawn({nPage: pageNum + 1, bRename: true, bOverlay: false});" // and so far it works well.

Then I have been looking how to have a page numbering system which will update itself automatically and i found the option to create a text form field with the calculated script: //"event.target.value = event.target.page + 1;"//

My problem is that when I create all these page numbering fields it works well up to page 9, and after page 9 I  have results which are decimals like 0.6, 0.3... which is not correct.

Do you know what I can do to get rid of this decimal presentation ??

Many thanks in advance for your help & support.

Have a nice day.