Jack tells the class that he has written a division problem in which 36 is divided into 4 groups of 9. which problem did he write?

The problem that he wrote was the division problem in which 36 is dificed into 4 groups of 9. Probably, he didn't mention the actual answer once 36 becomes groups of what 9 people if the students divided it, or how many are the 4 groups of 9 people all-in-all.