That is a tricky thing to do.. Bulb or tuber plants in general depend on this bulb for energy storage. Bulbs develop grow eyes from which new young plants sprout. You can dig up and divide bulbs and grow on the seperate plants. But this is a tricky thing to do, damaging and cutting the bulb can definitvely weaken the plant and they might both die. How to go about is not easy to explain in words.. Because depending on the sp. the bulb rizome can have odd shapes and need to be closely inspected to find the best place to cut.
As seen bellow thsi rhizome developed 2 grow eyes from its bulb till now and growing 2 plants from the same bulb. It could be cut in half and grow on the plants seperately. But as said you end up with 2 severely damaged bulbs with a huge open wound. This can go either way, 2 plants or death. Much older bulbs can have much more grow eyes and plants growing fro it.
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The plant depends on its bulb as energy storage, dividing it you will make seperate plants with a smaller and damaged storage facilty at their roots.
As said it can be done, but succes is not garanteed.. Where yoy need to cut, i can't tell you from a picture, if the bulb is mature and big enough i would need to see it in person and inspect it. Than if cut you need to work very cleanly with causion to nurse the cut bulb back to good health. Prevent rot from kicking in..
I had my fair share of failure and succes with bulb division.
But we have to start somewhere, we all have to learn at a cost (or not).. Success if you are willing to take the risks..
Google for dividing bulb plants and you'll find enough tutorials how to go about. The division of a tuber rhizome is pretty general prosedure if you know where to cut.. The draw back in our hobby is a wounded plant in soaking wet (submersed) invironment, making it tricky.