Albert has 4 * 9 books belonging to Stu = <<4*9=36>>36 books.

So the pair have a combined total of 36 books belonging to Albert + 9 books belonging to Stu = <<36+9=45>>45 books.

# Answer

45
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
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?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
45
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?
train