The container is not at the posted coordinates, but is within 2.5km.
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Want to see a mental/math magic trick? Okay!
1) I have one-hundred cards, each of which has one of the numbers from one to one-hundred written on it. Mentally shuffle the deck, and decide which one you are going to pick.
2) Write out the card number you picked.
3) Concentrate hard on what you have written.
4) You should now be able to solve this substitution to get the final coordinates:
5) You can check your result on the Geochecker below.
6) And voila! You now . . . wait, you didn't solve it yet? Are you sure you followed the instructions? Oh well, try again; you are bound to get it eventually.