Very peculiar rounding rules

The program rounds very strange. Thus, for example, has the conversion of 2m in imperial measure with 6TF 7in an error of more than 6mm. Are you a 2.00m but what yes now correspond undeniably worth 2m, will be converted into the more detailed 6ft 6,74in. This makes the app when it comes to reasonably dimensionally accurate conversions, advance significantly less attractive.