What 4 groups of what equals 28?

Oh, dude, you're hitting me with some math, huh? Well, technically, if you're looking for 4 groups of numbers that equal 28, you could have 7, 7, 7, and 7. That's like basic math, man. But hey, if you wanna get all fancy with it, you could also do 14, 7, 4, and 3. It's all good, math is math, right?