Suzy was putting a stone boarder around her square garden.she las able to complete one side of her garden before she ran out of stones.she usted 9 sones for the first side.How many more stones will she buy to complete her stone boarder?

A boarder is someone who rents a room and is served meals at his residence.

A border is like a fence around a place.

A square has 4 equal sides. If one side has 9 stones, how many stones are needed for the other 3 sides?