अष्टशताङ्गुलं धनुः पथिप्राकारमानं पौरुषं चाग्निचित्यानाम् ॥ कZ_०२.२०.१९ ॥
aṣṭaśatāṅgulaṃ dhanuḥ pathiprākāramānaṃ pauruṣaṃ cāgnicityānām
Ein dhanu beträgt achthundert aṅgulas; es ist das Standardmaß für Straßen (pathi) und Wälle/Mauern (prākāra) und zugleich der pauruṣa‑Standard für Feueraltar‑Bauten (agnicityā).
They enable consistent planning and auditing of macro-projects (roads, walls), where small-unit counting would be slow and easier to manipulate.