request.setAttribute("result", result);这是java web中的一段代码有错误怎么改（The method setAttribute(String, Object) in the type ServletRequest is not applicable for the arguments (String, double)

request.setAttribute("result", result);这是java web中的一段代码有错误怎么改（The method setAttribute(String, Object) in the type ServletRequest is not applicable for the arguments (String, double)