The Original British Monetary System
Two farthings = One Ha’penny. Two ha’pennies = One Penny.
Three pennies = A Thrupenny Bit. Two Thrupences = A Sixpence.
Two Sixpences = One Shilling or Bob. Two Bob = A Florin.
One Florin and one Sixpence = Half a Crown. Four Half Crowns = Ten Bob Note. Two Ten Bob Notes = One Pound (or 240 pennies). One Pound and One Shilling = One Guinea.

The British resisted decimalized currency for a long time because they felt it was “too complicated”.

-from the book "Good Omens" by Neil Gaiman and Terry Pratchett