45 POINTS FOR A CORRECT ANSWER!!!! No links though, those are super sus and I don't like those. If you do something sus I will report you. :) But please help me! I'm super confused and a thorough explanation would really help! Thanks to anyone who answers in advance!

A specific type of bacteria reproduces through binary fission every two hours. If there are seven bacteria to begin with, how many bacteria will there be after four hours?