Each plant has it's own root, and is attached to another plant via a runner. Just cut the runners between each leaf. You should be able to kind of pull apart the bunch and see long strands of ET on the runner. Just snip it off at every 2nd plant, between 2 plants of course. Don't cut the plant itself, just the runner. Each small leaf is a single plant.
55G Filstar XP3 - 16" Fire Eel
75G Medium Planted - Filstar XP3 Low Light - Established Feb 2006