Question 826023
My goodness, you people must have been around for a very long time! ;)

If your father's age is three times your mother's age, then divide 1236 by 3 to get your mother's age. {{{1236/3 = 412}}}
If your age is twice your mother's age (meaning either she's actually your stepmother or you're a time traveler, haha), multiply her age by 2 to get your age. {{{412*2 = 824}}}
You are 812 years old.