Untitled

public class Calculator   
{  
    public int dot(int x, int y){
        return x * y;
    }

    public int add(int x, int y){
        add_rs = x + y;
        return rs;
    }

    public int divide(float a, float b){
        result = a/b;
        return result;
    }

    public String nothing(){
        return "nothing";
    }
}