def process_longitude(cell):
    """Return the longitude from a cell."""
    long = cell.strip().split("/")[1]
    long = long.strip()

    if len(long) == 8:
        sign = 1
        long = long[:7]
    else:
        sign = -1

    if long[0] == "0":
        deg = int(
            str(long[1]) + str(long[2]),
        )
    else:
        deg = int(
            str(long[0]) + str(long[1]) + str(long[2]),
        )

    return sign * float(
        deg
        + int(
            str(long[3]) + str(long[4]),
        ) / 60
        + int(
            str(long[5]) + str(long[6]),
        ) / 3600
    )