import math


def get_rgrids(max_value, rgrid_count):
    """Calculate radial grid steps and return it as a list"""


    digits = math.floor(math.log(max_value, 10))
    scale = max_value / (10**digits)

    ubound = math.ceil(scale) * (10**digits)
    step = ubound / (rgrid_count+1)

    return list(step * i for i in range(1, rgrid_count+1))