A gift from the Greeks

Start with the year (BC) of the first recorded Olympic Games,

Multiply this by the number of times Hector ran around the walls
of Troy before fighting Achilles,

Add to this the number of days Achilles dragged Hector's body
around the battlefield,

To this number, add the number of years Odysseus was held captive
as Calypso's lover,

Subtract the age at which a Spartan became eligible for military
service.

This total must then be divided by the number of metopes above
the main entrance of the Parthenon, depicting battles between the
Gods and Giants.

Then subtract the number of outer pillars in the Parthenon,

And finally, add the number of rows of seats in the theater at
Epidarus in the 4th century BC.