**X 4 8 9**

5 6 X 7

1 X X X

3 2 X X

Consider the Xs as black squares in a crossword and evaluate the sum of the sums taken per row:

5 6 X 7

1 X X X

3 2 X X

**S**

_{r}=489+(56+7)+1+32=585.Same operation per column:

**S**

_{c}= 513+(46+2)+8+97=666Evaluate the ratio

**r= S**

_{r}/ S_{c}=585/666= 0.878378...
Your task :

Distribute the 9 non-zero digits and 7 black squares in a 4x4 grid so

that
the ratio **r**, calculated as in the example above will be as close

to the value of pi (=3.14159265…) as possible.

Ha**PP**y **P**i day, every **P**erson.