ESc101N Laboratory Assignment
                        Monday of week of 16/8/04

PROBLEM: Write a program (with one class and that too having 
only the "main" method) to compute the inverse of a non-singular
integer matrix of size 3X3. 

Details:

1) You may read the input in row-major order (a11, a12, a13,
a21, a22, a23, a31, a32, a33) using getInteger method of
InputBox class. You can assume that input matrix is non-singular.

2) To compute the inverse of a matrix A use following formula

                                       [A11 A12 A13]
                 Inverse of A = (1/D)* [A21 A22 A23]
                                       [A31 A32 A33]

where Aij is the determinant of A after removing the row and the 
column of element aji (the ji-th element of A), and D is the
determinant A.

3) Note that D and Aij's are integers so in their computation you must
use integer variables (say int). But when you compute Aij/D the result
will be real (non-integer) in general. So you must use float
or double variable to store it.

4) Use OutputBox class to print the result. Print it in the
normal matrix format, i.e., in 3 rows and in each row 3 numbers.