def _translate(num_time):
    """Translate number time to str time"""
    minutes, remain_time = num_time // 60, num_time % 60
    str_minute, str_second = map(str, (round(minutes), round(remain_time, 2)))
    str_second = (str_second.split('.')[0].rjust(2, '0'), str_second.split('.')[1].ljust(2, '0'))
    str_time = str_minute.rjust(2, '0') + f':{str_second[0]}.{str_second[1]}'
    return str_time