there are still capital rserve requirements. but imagine we ignore all of that: yes, so they're lending out 100 bucks from the 100 bucks i gave them. they're still not "printing money" - everything they give is what i gave them
you're forgetting the next person they give that 100 bucks to, deposits that money (if not completely spent) into a bank, which is again used to lend out more money.
