When your exchange is done, you'll see the notification with your transaction ID. In some cases you can earn more than expected (just like on the screenshot below), and sometimes you may receive a bit less due to high volatility of the market rates.
You'll see all the transaction details below.
You can also add your ETH wallet address to get some extra NOW tokens for your exchange.
Please note that if you see your transaction as completed but the coins did not appear in your wallet, you should check all your exchange data on this page carefully: sometimes it turns out that users specify an incorrect wallet address. If this is a valid address that belongs to somebody else, your coins will be sent to that user and we will not be able to recover them. Therefore, be very careful while creating your exchanges and double-check all the details.