Mario 64 was 64 Megabits... or 8 Megabytes, and the Zelda titles weighed in at something like 4x that... or about 32 MB... Resident Evil 2... that was a large game, too. That may have actually been 64MB.
Bits. Bytes. Meh.
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If mathematically you end up with the wrong answer, try multiplying by the page number.