This multi-cache is best done on a bike, though it can also be done as a leisurley stroll of about 1-1.5 hours.
Take a picnic lunch or have a BBQ at one of the most popular family destinations in the eastern suburbs. Park your car in any one of the numerous car parks, or ride in via the Dandenong Creek Trail, and proceed to:
S 37 deg 54.049 E 145 deg 12.148 There used to be some posts here, but it's just the initial point for this walk, which you can skip to the second point now if you want to.
Go around the lake (or swim across if you like) to: S 37 deg 53.928 E 145 deg 12.301 Stay a while and enjoy the birdlife if you like.
While you're there answer these questions:
How many frogs are pictured in "Frogwatch"? This number is B.
Count the number of birds in on the left panel as you face the lake. This number is C.
What is the length of a Little Pied Cormorant? This number is D.
How many letters in the third word in the name of the bird "White Throated ......"? This number is E
XXX=D+E+(C/4)
YY=(E*C)-(B+2)
Your final co-ordinates are: S 37 deg 53.XXX E 145 deg 12.0YY Cache is only a few metres off the bike trail, and quite well hidden. Please make sure the lid is put back on securely when you leave.