Looking at your post above:
29°45' x 60 = 1785nm.....................HERE I GET 176700?????
Your mistake is that you have multiplied the number 2945 by 60 to get 176700.
You have overlooked the fact that 45 minutes is 3/4 of a degree, so 29°45' is 29.75 degrees.
If you multiply 29.75 x 60 you will get the correct answer of 1785.
If you go on to do the ATPL exams you will spend many hours practicing this type of stuff and you will need a calculator which is able to handle minutes, degrees and seconds. But that is all tomorrows nightmare, so it's nothing to worry about at the moment?