I don't have multiples BUT I was a preschool teacher for a year for 2 yo's. What I suggest is to keep them on a schedule. Structure can always alleviate boredom, whining and tame some energy, as well as helping them learn and discover. "Idle hands are the devil's playthings"!
Try this: After bfast, have them help you clean. Give them a wipey or damp paper towel and have them "wipe" things down while you clear the table and put things away. After that, spend 15-20 doing each: puzzles, color, reading, even put on some music and sing and dance. After that give them some sort of art project like playdoh or finger painting w/pudding or playing w/popsicle sticks. Make a big deal about putting things away - it'll not only teach them how to help put things away but they'll learn the art stuff is special and will look forward it again and maybe encourage good behavior.
Give them a snack and then let them have some free play/independent play so you can have a break..if they'll let you have one.
If you are doing housework, involve them. Let them put the clothes in the washer/dryer. Let them "help" you fold clothes. Get them each a dustpan and they can sweep their own little spots while you clean the floors. Give them a wipey and let them "dust" something like a window while you dust (dry feather dusters or swiffers might make them sneeze). My personal favorite chore I gave my 2 yo was to have him "dust" the baseboards. When I was emptying the dishwasher, I filled the sink w/a little water and soap and let my kid "wash" some plastic tupperware.
I suggest letting them play with only a few toys at a time, and then rotate every 10-15 mins. It might just buy you a few mins here and there of peace and quiet.
I'm assuming they take naps after lunch...give them a snack and have them do a light reflection of the morning's schedule - puzzles, music, reading. After that is when we played outside and let them run around.
At home, when I kept this schedule for my son, video time was saved for when I started dinner and straightened up the house.
You might want to develop a little schedule of things they could do after dinner, like helping put away toys, put their clothes in the laundry basket, stuff like that.
Keep them busy! It'll be more work/planning for you but at least it will be to their benefit, instead of everyone being bad, stressed and frustrated.
gl!