No decimal in Number format

I need to remove 2 zero decimal in Number format,
123,456,789.00 -------------> 123,456,789
Any solution?

Where do you need this? Monetary values should show in units available in a currency. For currencies that have deprecated fractions of the currency unit, decimals for monetary values should not show (as long as you have selected that base currency). For non-monetary values, decimal fractions would be available (such as for fractions of inventory item units).

I use Iran Rials .

Yes, but where do you want to limit decimals? Only for currency figures?