Recently I read a joke from a book named It must be Beautiful: Great Equation of Modern Science (Farmelo, 2002).
The author wrote a joke:
A mathematician, a physicist, an engineer and a biologist are together and someone asks them what is the value of 
The mathematician responds crisply that it is “equal to the circumference of a circle divided by its diameters”.
The physicist counters that is is “3.141593, give or take 0.000001”
The engineer says it is “about 3”.
And, the biologist asks back, “What is
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Someone was not happy with this joke and asked me what is the value of
I said, “I am just a tutor. Please ask your lecturer.”
titanlab.org 
you’re right. this is full of absurd ideas.
For me, pai is something that you can eat when you hungry; a thing to be remembered when exam come…