अष्टशताङ्गुलं धनुः पथिप्राकारमानं पौरुषं चाग्निचित्यानाम् ॥ कZ_०२.२०.१९ ॥
aṣṭaśatāṅgulaṃ dhanuḥ pathiprākāramānaṃ pauruṣaṃ cāgnicityānām
A dhanu is eight hundred aṅgulas; it is the standard measure for roads (pathi) and ramparts/walls (prākāra), and also the pauruṣa standard for fire-altar constructions (agnicityā).
They enable consistent planning and auditing of macro-projects (roads, walls), where small-unit counting would be slow and easier to manipulate.