Nav 2016 invoice want in decimals 0.00 is not working

In nav 2016, in general ledger setup and sales & receivable and purchase & payable setup, all round precision is set 0.00, still when i enter unit price 40.2 for 2 qty, automatically instead 80.4 it's converted in 81 in the line. Also i've done setup the local currency
Please let me know how to turn off round precission