I know the difference between the ideal and practical, but I guess I just don't understand what I am looking at. The voltage output for the ideal was 11.5V and with adding the feedback resistor which is double the input resistor I saw 13.1mV. Can someone help me realize what went on. Keep in mind this is my second circuits class and I haven't taken a circuits and differential equation class for about a year so things might need to be broke down into baby steps.

Thanks.