In Romania, after rampant inflation in the 90s, our currency had stabilized in the 00s at a point where a loaf of bread was something like 5-7000 ROL, while a typical salary was maybe 50M ROL. 1 EUR was maybe 35k ROL.
The government then decided in 2005 to slash these extra zeroes, and replaced ROL with RON, at a fixed price of 1RON = 10k ROL.
The funny thing is, people got used to the new values for small purchases, but for bigger sums, you still hear plenty of people discussing about things in terms of "hundreds of millions" (implying old ROL) instead of the newer values, 17 years later. This is true even though larger sums are also commonly denominated in euros, and it's easy to compute 100k euros = 500k RON. Still, many still go the extra step and say = 5 billion ROL.
Note: both RON and ROL are named "leu/lei" in common usage, but I've used the currency symbols to make it clearer, and because I don't think most would know how to read "lei" (it's read like English "lay" ; for "leu" there's no equivalent, English doesn't have the "eu" diphtong).
It's also funny, in the context of this article, that this is the Romanian word for Lion - so I could say my house is worth five hundred thousand lions!
The actual etymology is based on a medieval Italian coin with a lion on one of its sides that was widely used in this region (don't remember from which Italian city-state).