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

### Instruction:
Rollo has 3 guinea pigs, the first guinea pig eats 2 cups of food, the second guinea pig eats twice as much as the first one, and the third guinea pig eats 3 cups more than the second one. How many cups of food does Rollo need to feed all his Guinea pigs?

### Response:
 Sungura wa kwanza = <<2=2>>2 vikombe
Sungura wa pili = 2 x 2 = <<2*2=4>>4 vikombe
Sungura wa tatu = 4 + 3 = <<4+3=7>>7 vikombe
Rollo anahitaji jumla ya vikombe 2 + 4 + 7 = <<2+4+7=13>>13 vya chakula kwa sungura.