The answer to this question will be based on your needs.
For example, if you have 10 employees that will be simultaneously working on a project that requires a Chaos product, you will need 10 workstation licenses.
In case you would like to improve the rendering time, you could acquire additional render node licenses, based on the number of additional machines that will be used.
If you would like to get additional information based on the specifics of your case, please feel free to contact our Support Teams or work with your preferred local Chaos reseller in your region.