For individual sports, the US sends 3(?) men to compete the in 100M. That means you can pick the 3 Europeans to represent the EU before the games start. Say you take the best from UK, Netherlands & France. If a German wins, it doesn’t count. Deal?

This is an interesting approach, but this is not this prediction's rules.
You can understand that I cannot make myself a simulation of the whole selection process that an EU team would mean and pick myself 3 athletes for hundreds of events.
And how could I guess the results of a single EU handball team or 4x100m relay?

Don't worry, as far as the men track 100 meters is concened, there's absolutely no chance that a EU athlete wins the Gold!

No, this prediction rules are clear and simple, whatever you like them or not.
This is not a simulation of the results of an hypothetic EU team.
This is about the arithmetic addiction of medals won by athletes from China, EU countries, and the US.
Feel free to play or not, to open another prediction thread with your own rules or not.