public class ConversionTool {

    public static void main(String[] args){}
    public static float CentimetersToInches(float centimeters){
        if (centimeters <= 0){
            return 0;
        }else {
            return centimeters * (float)0.393701;
        }
    }

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

    }

    public static float FeetToMeters(float feet){
        if (feet <= 0){
            return 0;
        }else {
            return feet * (float)0.3048;
        }

    }

    public static float MetersToFeet(float meters){
        if (meters <= 0){
            return 0;
        }else {
            return meters * (float)3.28084;
        }

    }

    public static float CelsiusToFahrenheit(float celsius){
        return celsius*9/5 + (float)32.0;
    }

    public static float FahrenheitToCelsius(float fahrenheit){
        return (fahrenheit - (float)32.0) * 5/9;
    }

    public static float MphToKph(float mph){
        if (mph <= 0){
            return 0;
        }else {
            return mph * (float)1.60934;
        }
    }

    public static float KphToMph(float kph){
        if (kph <= 0){
            return 0;
        }else {
            return kph * (float)0.621371;
        }
    }
}