sāvadhānaṁ nirūpitam

savadhanam nirupitam
maitreyah uvaca-Maitreya said; krtam-the age of Satya; treta-the age of Treta; dvaparam-the age of Dvapara; ca-also; kalih-the age of Kali; ca-and; iti-thus; catuh-yugam-four millenniums; divyaih-of the demigods; dvadasabhih-twelve; varsaih-thousands of years; savadhanam-approximately; nirupitam-ascertained.