It is a question of knowing how many decimals of the mathematical constant pi (π ... your day-to-day life, it's just the digit which the aerospace entity uses for its various activities.

Thursday, March 14 (3/14) is National Pi Day. It’s a time to celebrate the number that represents the ratio of a circle's circumference to its diameter, and is often written as 3.14. It’s also ...

Celebrating Pi day is an opportunity to recognise the work of mathematicians throughout the ages, and to hold fun activities such as Pi baking, trying to remember Pi's digits, creating Pi chains ...