EepyBird’s Sticky Note experiment on Vimeo (via Vimeo)
Here’s how it used to be:
Two farthings = one ha’penny. Two ha’pennies = one penny. Three pennies = A thruppeny 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 thought it was too complicated.