# Python3 program to calculate the
# value of pi up to 3 decimal places
from math import acos

# Function that prints the
# value of pi upto N
# decimal places
def printValueOfPi():

    # Find value of pi upto 3 places
    # using acos() function
    pi = round(2 * acos(0.0), 10)

    # Print value of pi upto
    # N decimal places
    print(pi)


# Driver Code
if __name__ == "__main__":

    # Function that prints
    # the value of pi
    printValueOfPi()