public String doFibonacci(String inputValue) {
    calculatedValue =
        "The Fibonnaci sequence number of "
            + inputValue
            + " is "
            + Double.toString(mathTool.getFibNumber(Integer.parseInt(inputValue)));

    return calculatedValue;
  }
  public String doFactorial(String inputValue) {
    calculatedValue =
        "The factorial of "
            + inputValue
            + " is "
            + Double.toString(mathTool.getFactorialNumber(Integer.parseInt(inputValue)));

    return calculatedValue;
  }
 public void start() {
   calculatedValue = Double.toString(mathTool.getFibNumber(0));
 }