The cache is NOT at the listed coordinates. You will need to answer some questions and do some simple math to find the cache. This is a good cache for the kids to help with, or for them to have a play while you do the seeking. If you don't like playground caches this is not one for you. The cache is a small painted sistema container with room for very small swaps.
The cache is at S 21° 09.ABC E 149° 09.DEF
A = V-U
B = Z-Y
C = (X÷Z)-Y
D = T+W
E = How many swings are there?
F = How many legs on the climbing spider?
T = How many large springs in the playground equipment?
U = How many climbing boards are there?
V = How many picnic tables are there?
W = How many bubblers are there?
X = How many individual pieces of play equipment in the park are there?
Y = How many eyes on the climbing spider in the playground?
Z = How many lamp posts in the park?