Grant has 4*90 = <<4*90=360>>360 vacations.

In total, they have 360 + 90 = <<360+90=450>>450 vacations and classes.

# Answer

450
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Grant has four times as many vacations as Kelvin has classes. If Kelvin has 90 classes, how many vacations and classes do Grant and Kelvin have altogether?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
450
Grant has four times as many vacations as Kelvin has classes. If Kelvin has 90 classes, how many vacations and classes do Grant and Kelvin have altogether?
train