Well, that's not something that can be predicted precisely. It could continue for a while if the story has more to unfold or come to an end sooner if the plot reaches a natural conclusion.
The Chainsaw Man manga has a considerable length. It consists of multiple volumes and chapters, but the exact number can vary depending on how you count and which editions you refer to.
I don't have the exact figure off the top of my head. But a quick online search or checking with manga enthusiasts should give you the answer about the number of Chainsaw Man manga volumes.
There were a few novels related to the chainsaw man that could be recommended. One of them was " Chainsaw Man: I Have Two Divine Powers ", written by Stupid War-chan. The story was about the protagonist, Kotone Shallow Feather, who had transmigrated to the world of the chainsaw people and obtained the power of the Divine Eyes. The other was Chainsaw Man: I Have Two Demons, written by Thirteenth Wang.
I don't have the exact number of chapters for Chainsaw Man manga off the top of my head. Usually, you can find this information on manga-related websites or by referring to the publisher's updates.