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

### Instruction:
 Kuna wavulana 9 na wasichana 12 darasani. Mwalimu anahitaji kuunda makundi ya wanafunzi watatu kwa shughuli ya darasa. Makundi mangapi yameundwa?


### Response:
 Kuna jumla ya wanafunzi 9 + 12 = <<9+12=21>>21 darasani.
Hivyo, makundi 21/3 = <<21/3=7>>7 yameundwa.