def find_empty(brd):
    """
    Uses the Sudoku problem as a Matrix input and returns the row/column location of the next empty field.

    :param brd: Matrix input of the board needed to solve for the Sudoku problem.
    :return: The row/column of the next empty field as a tuple.
    """
    for i in range(len(brd)):
        for j in range(len(brd[0])):
            if brd[i][j] == 0:
                return i, j  # i: row, j: column
    return None