It's just the letter π, first the symbol and then spelled out. Like the exercise λ λαμδα, α αλφα, μ μι, etc.
And does it mean the same thing to Greek speakers as it does to English speakers?
Well in the Greek numbersystem still in use
π = 80
and should be in the translations.
Π or πει ή πι is also the name of the letter π which denotes the sound p in pee
As well as the constant π known as Arcimedes constant in more than 1000 years because Archimedes was the first one to give an algoritm for the irrational number π (3,1415 ...)
The ancient Greek philosopher Platon is also involved in π.
Ηe said: Eternal the God the great geometrician, or
Αεί ο Θεός ο μέγας γεωμετρεί = 314159 (αει = 3, ο = 1, θεος = 4, ο = 1, μεγας = 5, γεωμετρει = 9, in the Gr. numbersystem)
and when will Duo teach us the Greek numbersystem together with the letters?
The symbols needed are 27. The Greek alphabet contains only 24 letters so 3 more come into use:
Ϝ δίγαμμα from which our F, later it became ς and is now often στ called στίγμα
ϟ κόππα also Q (became our letter q)
ϡ σαμπί, like pi, σαν πι: ν + π is μπ
To Ελληνικό σύστημα αρίθμησης
Α, Β, Γ, Δ, Ε, F, Ζ, Η, Θ = 1, 2, 3, ... , 9
Ι, Κ, Λ, Μ, Ν, Ξ, Ο, Π, Q = 10, 20, 30, ... ,
Ρ, Σ, Τ, Υ, Φ, Χ, Ψ, Ω, ϡ = 100, 200, 300, ... 900
(Ancient Greek did not have small letters. They can also be used)
The Greeks had a lot of fun playing with that words are numbers
Ex. If you put one hundred in the middle of a burning fire/ φωτιάς you will find a king.
SOLUTION: Another word for fire is πυρός. Ιf we put 100=ρ in the middle we get Πύρρος οr Pyrros king of Epiros.
Ορισμός-Definition: XY = X + Y
The usual order is the greater number first sometimes with an acute accent to show that it is a number not a word: 315, 300(T)>10(I)>5(E) is not wriiten ETI though it gives the same number as TIE or TIE´ to show that it is a number and not a tie
- 153 = ρνγ οr ρνγ´, 306 = τς, ϡqζ´ = 999
were written as a couple: first the numerator ( only if not one) followed by the denominator and 2 accents showing that this is a fraction
one third = γ''
2/5 = β'ε''
Ορισμός: The accute accent upsidedown in front of a number means 1000 times. (I do not have this symbol so I use ,)
5823 = 5000 (,ε)+800 (ω)+20 (κ)+3 (γ) = ,εωκγ´
, ΒΙF = 2016
10 000 = M , η μυριάς/ the myriad
Read about numbers > 9999 and how M was used in: http://www.russellcottrell.com/greek/utilities/greeknumberconverter.htm
Here you can find what I said maybe more easy to understand and a lay-out which I cannot produce Classical Greek Numbers http://gwydir.demon.co.uk/jo/numbers/greek/