Step-by-step explanation:
Hyperinflation in Zimbabwe caused the value of its currency to massively decrease, so that billions in Zimbabwean currency was less than a single US Dollar.
This was why despite being one of the poorest nations in the world, Zimbabweans could just make objects like kites and paper bags with billion dollar bills, because selling those bags and kites would bring them more money than the billion dollar bills themselves were worth.