def convert_plotly(value: float) -> float:
    """ Convert the given element to the proper value used in plotly polar
    plots.

    Works with _Variant.polar_x, _PolarLocus.theta, _PolarLocus.width, using
    the somehow magic number 57.1.

    Args:
        value: input value to convert

    Returns:
        adjusted value
    """
    return value * 57.1