Abū Saʿd with arithmetic lessons by which the boy was to master complex accounts. Arithmetic lessons were to be held through the use of the abacus.NB: This document is sometimes cited as T-S NS J401.21.
As to arithmetic, he should master the use of the abacus, the decimals [ ........................ ] and the
accounts,
not more. It was agreed that the el[der Abu ʾI-Faḍl would receive these 2 dinars] any time he applied for them and that the payment would not be deferred.