How to get list.permutation with its list item repeatly counted

I am having a trouble as follows:

say I have 1,2,3 3 numbers, I want to permutate them so it gives 11 12 13 21 22 23 31 32 33. But this List permutation only gives me 12 13 21 23 31 32 , with those self-repeating item group deleted.

Sorry to be stupid but really an’t figure it out. Thanks a lot for your kind help!

Are you sure it’s not the Cartesian Product you’re after?

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That is Exactly what I want. Thx!!!