This verse says that Aryabhata was exactly 23 years of age on the date which, according to the calendar being followed today, corresponds to March 21, 499 CE
More quotes by Aryabhata
Translates to: for a triangle, the result of a perpendicular with the half-side is the area.
When it is sunrise at Lanka, it is sunset at Siddhapura, midday at Yavakoti, and midnight at Romaka.
Attribution
Quote text and notes from Wikiquote: Aryabhata (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.