class Astronaut{

	Double earthWeight;
	
	Astronaut (double weight) {
	
		earthWeight = new Double(weight) ;
	}

	public double moonWeight () {
	
		return earthWeight.doubleValue() * .166;
	}
}

class PlanetScale {

	Astronaut armstrong;

	public static void main(String args[]) {

		char		c;
		double		earthWeight;
		StringBuffer	strn = new StringBuffer();
		double		moonWeight;
		Astronaut	armstrong;
	
		System.out.println("your weight on earth ?");
		
		try {
			while(( c = (char)System.in.read()) != '\n')
				strn.append(c);

			earthWeight = Double.valueOf(strn.toString())
				.doubleValue();
		} catch ( java.io.IOException e) {
			earthWeight = 0.0;
		}

			armstrong = new Astronaut(earthWeight);

		System.out.println("Your weight on the moon is " +
			armstrong.moonWeight());
	}
}