/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	
	public static double suma(double n, double m){
		double suma = n + m;
		return suma;
	}

	static double resta(double n, double m){
		double resta = n - m;
		return resta;
	}

	static double multiplica(double n, double m){
		double multiplica = n * m;
		return multiplica;
	}

	static double cuadrado(double n){
		double cuadrado = Math.sqrt(10);
		return cuadrado;
	}
	
	public static void main (String[] args) throws java.lang.Exception {
     System.out.println(suma(4, 10));
     System.out.println(resta(4, 10));
     System.out.println(multiplica(4, 10));
     System.out.println(cuadrado(10));
     
	}
}