How to display 'numberformat' value (ex: 12,340,000) in viz chart

Hello.

I use the viz chart in my programs.

I want to change String value(ex: 12340000) to 'numberformat' value (ex: 12,340,000) in viz chart

(exactly saying, I want to see the comma in number.)

Now,

I already have tried using y- axis options, but I failed.

Help me.

I attach the capture file about my problem.