The three brothers went to the gym to run at the same time, and each of them was going to run for three minutes. There are two treadmills available in the gym.
If three brothers go to the gym at the same time, two people can run first, one person can wait while running, then the third person can finish running for three minutes, and then the other two people can warm up for one and a half minutes with the treadmill next to them, and then they can go to the gym together. It's not bad that it won't be competitive if it's reasonable