I would like a verb f such that f returns a literal that is exactly the number 
that was typed.  ie:

    f 3.12
3.12
    f 3.120
3.120

    ": 3.12
3.1200000000000001
   

I need this info to simply count the number of decimals given, so if there is 
an alternate way of doing this, and the above is impossible, then help is 
appreciated.


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