python- having issue with math : Having an issue with the math in the code. after the first person's payout is calculated the other 2 are done incorrectly, 

1/2 to Stan.
2/3 of what remains to Kyle.
The rest is to be split equally to Butters and Wendy.

my first split to Stan is correct but after that can't seem to figure out the correct way to code it. 

                         def main():
    estate = int(input('Enter value of Kennys estate '))
    stan = estate / 2
    kyle = stan * .66
    wendy_butters = kyle / 2
    

    print('stan gets$ ',format (stan,' .2f'))
    print('kyle gets$ ',format (kyle,' .2f'))
    print('Butters and Wendy each get $ ',format (wendy_butters,' .2f'))
    
main ()

