Kids in your room

So, I have a question and I don’t know how other mothers feel about it. Anyways, I have 4 girls and I love them to death. They are your normal girls who fight about dumb things and aggravate one another. I have a 9, 5, 3, and 2 year old so things can get chaotic sometimes. I just wanna know how long can y’all handle your kids in your room before they start to do stuff that aggravates you. I don’t mind my kids being in my room, but once they all get in here it’s a fight over something or one of the older ones makes the babies cry. I feel like my room is kinda like my area of peace and when I want my kids to be out of it for a little while they can go do what Kids do. We have cable and Netflix and they have tablets. They also have ample amounts of toys and a trampoline outside and bikes. They always say they are bored but idk how that’s even possible. Now, I’m not saying I want them out of my room all day or tell them to get out as soon as they step foot in it. I just wanna know how long you can handle all your kids in your room at one time.