//GenericFunctions.ClickOnButtonByXPath("//span[contains(text(), '" + input + "')]", driver);
public static void CalculatorButton(string input, IWebDriver driver, int inputOrder)
{
GenericFunctions.ClickOnButtonByXPath("//*[@class='cwbts'][contains(text(),'" + input + "')]", driver);
StoreKeyPress [inputOrder] = input;
}