def divide(gdf, left, right):
    """
    Division of 'left' by 'right'

    Parameters
    ----------
    gdf : GeoDataFrame
        Input GeoDataFrame
    left : str, numeric
        Left column or value in expression
    right : TYPE
        Right column or value in expression

    Returns
    -------
    result : Series
        Float series

    """
    expression = " / ".join(map(str, [left, right]))
    return gdf.eval(expression)