It's the floor of pi*1000000000.
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It takes a lot of concentration and free time to calculate the billionth digit of pi. The billionth digit of pi is nine.
The billionth digit of pi is 9. http://www.geocities.com/ultrastupidneal/Knowledge-Mathematic-Fact.html
The first digit of pi is 3, the first decimal is 1. Pi ≈ 3.14 The first fifty digits are 3.1415926535897932384626433832795028841971693993751
3
the first 35 digits of pi is... 3.14159265358979323846264338327950288