def fac(n)
	[*1..n].reduce(1,:*)
end
N=10
X=(0...N).sum{|n|(-1)**n*(1123+21460*n)*fac(4*n)/(882**(2*n+1)*(4**n*fac(n))**4).to_f}
Y=Math.sqrt(8)/99**2*(0...N).sum{|n|fac(4*n)*(1103+26390*n)/((396**n*fac(n))**4).to_f}
printf "%.16f\n",gets.to_f*X/Y