Manasara 18.36

18.36

aṣṭāviṃśatibhāgaṃ syānnavaviṃśatibhāgikam
kṣudramekādaśatalaṃ bhāgamānaviśālake

or twenty-eight parts, or twenty-nine parts: / [such is] the smaller eleven-storeyed [vimāna] in its proportional width.