Round to 1 decimal place

Round to 1 decimal place

I have a function field to convert Centigrade "C" to Fahrenheit "F".  The conversion calculation is simple: "input.TemperatureC * 2 - input.TemperatureC * 2 / 10 + 32.round(1)" but it displays as 2 decimals.  I only want one decimal rounded correctly.  I know I can achieve that by converting to text but do not want to go down that route.  What am I doing wrong?  Or, if I am not doing anything wrong, how do I accomplish my requirement?  I am using Creator 5.