City of Gaithersburg does not normally allow geocaches to be hidden in city parks, so I created Adventure Labs to highlight some of our wonderful city parks. This geocache is a BONUS to many of my Adventure Labs.
Cache is not at posted coordinates. You must complete any of these Adventure Labs:
Final Location: N 39° AB.CDE' W 77° PQ.RST'
You can find the numbers M and N in the journal section of the Adventure Labs. Each Adventure Lab includes the same numbers, so you only need to play one Adventure Lab to obtain the solution.
ABCDE + PQRST = M
ABCDE × PQRST = N
City parks are open between sunrise and sunset, so you should only play the Adventure Lab(s) during daytime. The final location is not in a city park and is available 24x7.

You can validate your puzzle solution with certitude.