public class ConversionTool {

    public static void main(String[] args){}

    public static float CentimetersToInches(float centimeters){
        float inches;
        if (centimeters>0)
        {
            inches = centimeters/(float)2.54;
        } else 
        {
            inches = 0;
        }
        return inches;
    }

    public static float InchesToCentimeters(float inches){
        float centimeters;
        if (inches>0)
        {
            centimeters = inches*(float)2.54;
        } else 
        {
            centimeters = 0;
        }
        return centimeters;
    }

    public static float FeetToMeters(float feet){
        float meters;
        if (feet>0)
        {
            meters = feet/(float)3.2808;
        } else 
        {
            meters = 0;
        }
        return meters;
    }

    public static float MetersToFeet(float meters){
        float feet;
        if (meters>0)
        {
            feet = meters*(float)3.2808;
        } else 
        {
            feet = 0;
        }
        return feet;
    }

    public static float CelsiusToFahrenheit(float celsius){
        return celsius*9/5 + 32;
    }

    public static float FahrenheitToCelsius(float fahrenheit){
        return (fahrenheit  - 32)*5/9;
    }

    public static float MphToKph(float mph){
        float kph;
        if (mph>0)
        {
            kph = mph*(float)1.6093440;
        } else 
        {
            kph = 0;
        }
        return kph;
    }

    public static float KphToMph(float kph){
        float mph;
        if (kph>0)
        {
            mph = kph/(float)1.6093440;
        } else 
        {
            mph = 0;
        }
        return mph;
    }
}