Diophantine is the author of Arithmetic, with thirteen volumes. These books have collected many interesting questions, and each question has an unexpectedly clever answer, which makes people think and enlighten people's wisdom, so that future generations call this kind of question Diophantine problem.
However, little is known about Diophantu's life. His only resume was found in a collection of Greek poems. This is the "epitaph" of Diophantine written by Mattel. "Epitaph" is written in the form of poetry;
"passers-by!
Diophantine is buried here.
Please calculate the following figures,
We can know how many winters and summers he has experienced in his life.
One sixth of his life was a happy childhood,
One in twelve are carefree teenagers.
Another seventh of a year,
He built a happy family.
Five years later, my son was born,
Unexpectedly, my son died four years earlier than his father.
I only lived half my father's age.
Poor old man who lost his son in his later years,
I spent my old age in grief.
Please calculate how old Diophantine lived.
To meet death? "
Please calculate, how old did Diophantine live to be?