public class Calculator : ICalculator
{
	   public int Add(int a, int b)
	   {
	       return (a + b);
	   }

    public int Subtract(int a, int b)
    {
        return (a - b);
    }

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

    public int Divide(int a, int b)
    {
        return (a / b);
    }
}
