This is an exaggeration.
The universe's radius is around 46.5 billion light years (around 4.4 * 10^26 meters), the error introduced of using 15 decimals of pi is around the order of 10^-16. Thus the error of calculating the circumference would be in the order of
8.8*10^26 * 10^-16 = 8.8*10^10 meters
B-b-but did the 12yo condemn Hamas?!?