Danio Fisheries issued 200,000 shares of $2 par value stock. The book value of Danio's common stockholders' equity is equal to $20 million. On August 1, Danio Fisheries implements a two-for-one stock split. After the stock split, the par value per share is ________ and the total book value is ________.

The answer is $1; $20 million. I want to know how to calculate.