Matrix2D^ Matrix2DCalculator::SubMatrix(Matrix2D^ matrix,int row,int column,int rows,int columns){

        int lie = matrix->Columns;
        Matrix2D^ a = gcnew Matrix2D(rows,columns,0);
        for(int i =row; i<rows+row; i++){
            for(int j = column; j<columns+column; j++){
                a->Elements[(i-row)*columns+(j-column)] = matrix->Elements[i*lie+j];
            }
        }
        return a;
    }