Number Puzzle

You must use all four integers exactly once [1, 3, 4, 6]. You may use each of the four basic arithmetic operators [add, subtract, multiply, divide], and parentheses, as many times as you wish (zero or more times). No other operators are allowed. You should end up with a simple formula that results in exactly 24. Integer math isn't allowed (eg: 6*4 + 1/3), where 1/3 is truncated to the integer: zero.

... I am still working on this one ...

... via Dave Brillhart's Blog ...