Given this configuration class, what will be the output when retrieving the bean named "calculator" and calling add(2, 3)?

Given this configuration class, what will be the output when retrieving the bean named "calculator" and calling add(2, 3)?

@Configuration
public class AppConfig {
  @Bean
  public Calculator calculator() {
    return new Calculator();
  }
}

public class Calculator {
  public int add(int a, int b) { return a + b; }
}