When I let go of something, it falls to the floor and hits it at exactly the correct speed. The correct speed accounting for gravity and the air and air current

When I let go of something, it falls to the floor and hits it at exactly the correct speed. The correct speed accounting for gravity and the air and air currents and all sorts of other things. That's a lot of calculations to make. And it was exactly correct at every instant of the fall as well! Somehow, all these calculations are being made instantly. Where are those calculations occurring?