If I subnet the Class B address 172.16.0.0 255.255.192.0

Then

Subnets = 2
Host = 16,382

I understand that in subnetting class B addresses you use the same subnet numbers in the 3rd octect as you do in the 4th octect with class C addresses.

The first subnet is 64.0 while the first host is 64.1 : the last host is 127.254
Thats all the info that i got from my CCNA book.
It didnt tell me the valid host in between 64.1 -- 127.254.

So I did a little math....... I figured that 64.1 - 64.254 then it repeats to 65.1 - 65.254
254 x 63 = 16,002 Im off 380....... so

My confusion comes from the 4th octect. What numbers does the fourth octect generate while the third octect uses the "regular" subnet numbers? What are the valid host, lets say the first 65, that I could use?

Later