Lizzy: If Stu has 9 books and Albert has 4 times as many books as Stu, how many books do Stu and Albert have in total?.
Me: Hmmm, let me think. I think this is the detailed solution:
Albert has 4 * 9 books belonging to Stu = 36 books. So the pair have a combined total of 36 books belonging to Albert + 9 books belonging to Stu = 45 books. Final answer: 45.