1 by
2 with
3 by
The name of my gadget is online book's world. You can buy it in the shopping centres, book's shops and shops of technology. It costs five thousand rubles. Sometimes in some shops there are sales so you can even pay less than usual. This gadget is a book's world where you can find different books of modern and classical writers. Also if you at school and you have to find the information or biography about the writers, you should use it. You can read easily and comfortably without flipping the paper.
2. With
3. By
With - когда говорится о материале, из которого что-либо изготовлено. By - когда говорится кем изготовлено