Hayanaratna · by Balabhadra
Chapter 7 · Finding the Dashas
दशानयनाधिकाराध्यायः
लग्नेंकग्रहहद्दांशभुक्तभोग्यांशसंगुणा॥तद्दशाखाग्नि३०भिर्भक्ताद्विधा ते गतगम्यके ॥२॥
Take that period. Multiply it by the degrees run and still to run in the hadda (a planet's own small part of a sign) where the lagna (rising sign) stands. Divide by thirty. The two results are the passed and coming parts.
Simple meaning: Hadda periods: the lagna's hadda lord's period is split into passed and coming parts by its degrees.
मे वृ मि क सिं क तु वृ ध म कुं मी
Table of hadda days in the year: for each sign, its five hadda lords and their days.
गम्या तुल्या तत्र दशाहद्देशस्यादिमा भवेत्॥
Hadda periods: the current hadda lord comes first, with its part to come. The others follow in the table's order.
भुक्ततुल्या दिनप्रख्यावर्षान्तेन्याग्रहहद्दजा ॥
Hadda periods: at the year's end, the first lord returns with its passed part. The count runs through the sign to 30 degrees.