def parse_big_number(num):
    """Parse large numbers into human readable format (e.g., 1K, 1M, 1B).

    :param num: int or float of number to parse
    :return: str of parsed number
    """
    if num < 1000.0:
        num = f'{num}'
    elif num < 1000000.0:
        num = f'{num / 1000.0:.0f}K'
    elif num < 1000000000.0:
        num = f'{num / 1000000.0:.0f}M'
    else:
        num = f'{num / 1000000000.0:.0f}B'
    return num
