Keen
=====

A mathematical Sudoku puzzle.  Fill the grid such that
each row and column has distinct numbers in each
square and that the clues for each block are fulfilled.
The clues are of the form of a result and a 
mathematical operator - when the operator is applied to
the numbers in the block, the answer should turn out to
be the given result.  E.g. "48*" means that when 
multiplied together, the numbers in that block should
give 48.

Use L and R to choose a number.
A-click on a square and press X to enter the number.
B-click on a square and press X to enter some provisional
numbers in that square.
