main.java

public class Calculatrice {
  public int addition(int a, int b) {
    return a + b;
  }

  public int multiplication(int a, int b) {
    return a * b;
  }

  public static void main(String[] args) {
    Calculatrice calc = new Calculatrice();

    System.out.println("Addition : " + calc.addition(5, 10));
    System.out.println("Multiplication : " + calc.multiplication(5, 10));
  }
}