hello, I was looking for a solution to sell products in multiples of Numbers. ... There is only the minimum amount and that is not good. Let me give an example: I have a chair sold only in multiples of 4. Then imposed the minimum quantity 4, but after the purchase, the customer can choose to buy 5 or 6 .. so on .. and that's not good .. should be able to add only in multiples .. I tried to follow the tutorial but without success .. can you help me?