Please note down the new value of pi: 3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067982148086513282306...
That the problem I have about the situation. I'm thinking of a physical standard to calculated pi. Like the current kilogram sphere. Has anyone bothered to measure it's radius and circumference with high precision tools. I'm not advocating to make pi legally 3.14. Just curious. If you do the calculation based on a micrometer vs millimeter tools you surely get a different result.
Although there are measurement techniques that do appropriate pi, that's done mostly because it's interesting. Typically one calculates pi, not measures it. The calculation can't ever be completed but the more you do, the better your approximation. One method is this https://en.m.wikipedia.org/wiki/Leibniz_formula_for_π
The rounding has a less significant impact than you'd think.
Interplanetary calculations of the highest precision will use just 15 decimals, which results in an error of about 1cm when calculating a circumference of 150 billion km.
But if you really want to measure even more accurately than that... The circumference of a circle with a diameter of 92 billion light years (as large as the known universe) can be calculated using 37 decimals of pi, and the result would be accurate within the width of a single hydrogen atom.