A friend of mine made a series of puzzles on a calculator, each one giving a 4-digit number as a solution. I decided to post these here. When a person finds out the solution to the current puzzle, I will give the next puzzle, which will give you the solution to the third puzzle etc. Use the mapping of the buttons to help you:
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|7M|8N|9O|
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|4P|5Q|6R|
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|1U|2V|3W|
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|0Z|
Here's the first clue:
NORTH NORTH EAST WEST
Good Luck!