#R 3.2.4, 55 bytes f=function(x)x*as.numeric(format(Sys.Date(),'%m.%d%y'))
> f(1) [1] 3.1416 > f(3) [1] 9.4248 > f(5) [1] 15.708 First attempt at a golf. Happy pi day!
#R 3.2.4, 55 bytes f=function(x)x*as.numeric(format(Sys.Date(),'%m.%d%y'))
> f(1) [1] 3.1416 > f(3) [1] 9.4248 > f(5) [1] 15.708 First attempt at a golf. Happy pi day!