द्विदण्डाधिको बाहुः ॥ कZ_०२.२०.२४ ॥
dvidaṇḍādhiko bāhuḥ
A bāhu is (a measure) exceeding two daṇḍas (i.e., two daṇḍas plus an additional fixed increment).
It indicates an additive increment beyond a base unit, signaling a conventional standard rather than a purely multiplicative conversion.