One day, Sir Cumference was having lunch with his son Radius when he got a stomach ache. So he sent Radius to get the doctor.
Ugh, I feel terrible. Get the doctor.
Radius couldn't find the doctor, so instead he brought back a potion. The potion turned Sir Cumference into a dragon.
Knights were sent to kill the dragon.
And don't come back until that dragon is dead!
Radius Found a potion to turn his father back into a human. To find the dosage, he found the radius of a circle and multiplied it by two to find the Diameter. He then divided the circumference by the diameter to get Pi, the dosage.
Radius turned his dad back into a human. Sir Cumference was very annoyed with him, but they still sort of lived happily ever after.