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?
How many vacations does Grant have? ** Grant has 4*90 = <<4*90=360>>360 vacations.
How many vacations and classes do Grant and Kelvin have altogether? ** In total, they have 360 + 90 = <<360+90=450>>450 vacations and classes.
#### 450