56. Dongdong has 9 cards, among which 4 cards have the number 2, 2 cards have the number 3, and 3 cards have the number 5. From these cards, any number of cards can be taken out, and the product of the numbers on the cards can be calculated (you can take 1 card or all 9 cards), the total number of different products that can be obtained is $\qquad$.
Answer: 59