How to calculate maximum database file size?

Info: 

• Maximum number of DB blocks are 4194304 blocks (2²²) per database file
• Maximum DB block size is 32 KB per DB block

SQL> show parameter db_block_size;
-- Generally it is 8192 byte (8 KB)

e.g. if block size is 8 KB;
maximum database file size = 4194304 x 8 KB = 33554432 KB = 32768 MB = 32 GB

e.g. if block size is 32 KB (this can be maximum 32 KB)
maximum database file size = 4194304 x 32 KB = 134217728 KB = 131072 MB = 128 GB

Ref: https://docs.oracle.com/cd/B28359_01/server.111/b28320/limits002.htm#i287915
https://docs.oracle.com/cd/B28359_01/server.111/b32009/appg_db_lmts.htm#UNXAR408