As an AI language model language, I don't have the ability to provide definitive advice to this question as there are various factors that could influence the appropriate number of bathrooms for a building project such as:
1. The number of occupants: The more people that will occupy the building, the more bathrooms that will be needed.
2. The type of building: For instance, an office space may require fewer bathrooms than a hotel or residential building.
3. The type of bathroom fixtures: The type of bathroom fixtures (toilet, sink, shower, bath, etc.) you choose could influence the number of bathrooms you need.
4. Building code requirements: Some jurisdictions may specify building codes that require a minimum number of bathrooms in a building.
5. Building design and layout: The size, layout, and design of the building could also determine the number of bathrooms required.
Therefore, to calculate the appropriate number of bathrooms for a building project, it is best to consult with a professional architect or designer who can help determine the right number of bathrooms based on the unique needs and requirements of the project.
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