 
 <prompt> ```Duncan age eight years ago na two times Adam age four years ago. If Duncan age na 4221623 now, how old Adam go be in 8 years? Write Python function.``` <response>: ```
def solution():
    """Duncan age eight years ago bin be two times Adam age four years ago. If Duncan age na 60 now, how old Adam go be in 8 years?"""
    duncan_age_now = 4221623
    duncan_age_eight_years_ago = duncan_age_now - 8
    adam_age_four_years_ago = duncan_age_eight_years_ago / 2
    adam_age_now = adam_age_four_years_ago + 4
    adam_age_in_eight_years = adam_age_now + 8
    result = adam_age_in_eight_years
    return result
``` 