εἰκοσαπλασίων
From LSJ
μεγάλα ὠφελήσεσθε πρὸς ἱστορίαν τῶν κοινῶν → that will be of great benefit to you in order to understand public affairs
English (LSJ)
ον, gen. ονος,
A twentyfold, Plu. 2.925c.
German (Pape)
[Seite 727] ον, dasselbe, Archimed.
Greek (Liddell-Scott)
εἰκοσαπλᾰσίων: -ον, = τῷ προηγ., Πλούτ. 2. 925C.