Did you know? GDP in Czechia (2019) (250.6 billion USD p/a) is 10 x GDP in Sudan (2019) (24.92 billion USD p/a)
Length of the Congo River (4,700 km)
/fact/length-of-the-congo-river
Link
If this was a standard unit ...
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.