Narada Purana — Purva Bhaga, Shloka 49
Jyotiṣa-śāstra Saṅgraha: Threefold Division, Gaṇita Methods, Muhūrta, and Planetary Reckoning
चापोननिघ्नः परिधिः प्रगङ्लः परिधेः कृते । तुर्यांशेन शरध्नेनाघेनिनाधं चतुर्गणम् ॥ ४९ ॥
cāponanighnaḥ paridhiḥ pragaṅlaḥ paridheḥ kṛte | turyāṃśena śaradhnenāgheninādhaṃ caturgaṇam || 49 ||
La circonférence (paridhi) s’obtient en multipliant le diamètre par le coefficient prescrit. Pour la déterminer, qu’on applique l’ajustement d’un quart selon la règle de calcul énoncée, constituant l’opération quadruple (caturgaṇa).
Sanatkumara (teaching Narada in a technical/śāstric mode within Mokṣa-dharma context)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
FAQs
It highlights that dharmic life (and the pursuit of mokṣa) is supported by śāstric precision—accurate measures and correct procedures are part of disciplined living, not separate from spirituality.
Indirectly: it shows that devotion is strengthened when worship and observances are performed with proper knowledge and exactness, aligning practice with śāstra rather than guesswork.
A computational/measurement rule akin to Vedāṅga Jyotiṣa and traditional gaṇita—using coefficients and stepwise operations (caturgaṇa) to derive values like circumference for practical applications.