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

### Instruction:
John has 3 children. He and his wife are supposed to buy notebooks for their sons but they couldn't agree on how many to buy. So John bought 2 notebooks for each of his children and John's wife bought 5 notebooks for each of them. How many notebooks did they buy in total for their children?

### Response:
 John alinunua daftari 2 kwa watoto wake 3: daftari 2/mtoto x watoto 3 = 6 daftari. Baba alinunua daftari 6.
Mke wa John alinunua daftari 5 kwa watoto wao watatu: daftari 5/mtoto x watoto 3 = <<5*3=15>>15 daftari. Mama alinunua daftari 15.
Sasa, jumla ya daftari ni 6 daftari +15 daftari = <<6+15=21>>21 daftari.