Aini and Bala each bought identical packets of stickers. There were round stickers and star stickers in each packet. Aini used 7 of her star stickers and the ratio of the number of her round stickers to that of her star stickers became 3: 1. Bala used 7 of his round stickers and the ratio of the number of his round stickers to that of his star stickers became 2 : 3. Find the total number of stickers in each packet that they bought.