Research..learn more. You can divide the tuber like a potato, you can take leaf cuttings, you can take stem cuttings (but do know what you're doing).

Leaf cuttings and tip cuttings... at least the tuber stays intact. I have a lot of trouble splitting the tubers = they are so easy to rot... Some people do it no problem. If it is Sinningia speciosa hybrid - they are readily propagate from medium and younger leaves. Just like AVs. Stick in a soil and keep it under the dome until it roots. Next thing - sooner or later it will send another shoot - and in good conditions this shoot even put a blossom out.