How to subnet four /25

[jrleonardo18]

anyone please help me..
how to subnet this?

172.16.0.0/25
172.16.0.0/25
172.16.0.0/25
172.16.0.0/25

 

[Emerald]

http://www.subnetmask.info/

 

[jrleonardo18]

the question is i have four different department that has a /25 how can i get the subnet if one octet is equal to 255 then 128+128=256?