conversations.from: human
conversations.value: Find the answer to the math problem: 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?
conversations.from: assistant
conversations.value: Grant has 4*90 = 360 vacations.
  In total, they have 360 + 90 = 450 vacations and classes.