Well, worry not.
Using the seedbed technique, one good sucker can give you over 100 seedlings!
Follow the steps below as I have done it recently making seedlings for my farm:
The rhizome pieces should start rooting as from week 2.
In excactly 30 days, the rhizome pieces should start sprouting.
Once the sprouts are 3 leaves old, remove and cut the seedlings off from there mother rhizome as they have independent rhizome n stem