Single product comes in pack

Hi,
not sure where to post, and if the software can manage it as now.
I have an item that i buy in pack of 3, but then i use 1 at the time, how to manage it?
i would like on the order page to say “i’m ordering 1 pack” and on the item it should say “3 items are on order”.
It’s something is already there?
Thanks for help