List price problem

Because my site uses VND as the main currency, it is usually about 8-digit number.

My problem is when I enter more than 7-digit number on the list price field, it will turn into 9999999.99.

I don’t get any problem with the price field, but on the list price it turns into 9999999.99

And on the front page, only the price shows up.

Is there anyway to fix it?