Microsoft no longer supports Access 97. You cannot buy a license from Microsoft. Legally, the software is considered "abandoned," though the copyright is still owned by Microsoft. Enthusiast communities generally consider downloading Access 97 for legacy hardware as "low-risk" grey-area activity, though this is not legal advice.
For serious legacy work, a portable app is a hack. The professional approach is: microsoft access 97 portable
LibreOffice Base can read Access 97 MDB files reasonably well. It is open source, safe, and runs portably via the "LibreOffice Portable" suite. The interface is different, but you can export your data to SQL or CSV. Microsoft no longer supports Access 97