422 Srimad-Bhagavatam [Canto 3, Ch. 11
PURPORT

The years of the demigods are equal to 360 years of humankind. As will
be clarified in the subsequent verses, 12,000 of the demigods’ years,
including the transitional periods which are called yuga-sandhyas, comprise
the total of the aforementioned four millenniums. Thus the aggregate of
the above-mentioned four millenniums is 4,320,000 years.

TEXT 19

TAN Hrs aa Hazy ra |
awearatta acenian faagonta varia a 12a

catvari trini dve caikam
krtadisu yathakramam

sankhyatani sahasrani
dvigunani satani ca

catvari—four; trini—three; dve—two; ca—also; ekam—one; krta-ddisu—in
the Satya-yuga millennium; yatha-kramam—and subsequently others;
sankhyatani— numbering; sahasrdni—thousands; dvigunani—twice; satani—
hundreds; ca—also.

TRANSLATION

The duration of the Satya-yuga millennium equals 4,800 years of the
demigods; the duration of the Treta-yuga millennium equals 3,600 years
of the demigods; the duration of the Dvapara-yuga millennium equals
2,400 years; and that of the Kali-yuga millennium is 1,200 years of the -
demigods.

PURPORT

As aforementioned, one year of the demigods is equal to 360 years of
the human beings. The duration of the Satya-yuga is therefore 4,800 x 360
or 1,728,000 years. The duration of the Treta-yuga millennium is 3,600 x
360 or 1,296,000 years. The duration of the Dvapara-yuga millennium is
2,400x 360 or 864,000 years. And the last, the Kali millennium, is 1,200
x 360 or 432,000 years.
