why 22/7 is used as the value of pai in maths

Manoj, Is it pai or pi? I think it is pi = 22/7 = 3.1416.pi is a mathematical constant whose value is the ratio of any circle's circumference to its diameter in the Euclidean plane; this is the same value as the ratio of a circle's area to the square of its radius. It is approximately equal to 3.1

It was tested for many circles and found that the ratio of the circumference to diameter is always same for any circle. It was equal to 22/7. Gave a notation PAI and now it is being used to simplify things involved with circles.

The value of 22/7 was given even before the world knew what it is . Aryabhtta, famous mathematician, astronomer and physicist gave this value in his book Aryabhattiya. Aryabhata worked on the approximation for pi (), and concluded that is irrational. In the second part of the Aryabhatiyam (gaita