Crear Una Calculadora

public static int sumar(int a, int b) {
    return a + b;
  }
    
  public static int restar(int a, int b) {
    return a - b;
  }
    
  public static int multiplicar(int a, int b) {
    return a * b;
  }
    
  public static int dividir(int a, int b) {
    return a / b;
  }