Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
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?

### Response:
 Grant ana likizo 4 * 90 = <<4*90=360>>360.
Jumla, wana likizo na masomo 360 + 90 = <<360+90=450>>450.