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

### Instruction:
In a school with 800 students, 5/8 of the students are girls. Seven-tenths of the girls and two-fifths of the boys are in the primary grades, while the rest are middle schoolers. How many middle schoolers are there?

### Response:
 Kuna wasichana 800 x 5/8 = <<800*5/8=500>>500.
Hivyo, kuna wavulana 800 - 500 = <<800-500=300>>300.
Wasichana 7/10, au 500 x 7/10 = <<500*7/10=350>>350, wako darasa la awali.
Wavulana 2/5, au 300 x 2/5 = <<300*2/5=120>>120, wako darasa la awali.
Hivyo, jumla ya wanafunzi wa darasa la awali ni 350 + 120 = <<350+120=470>>470.
Hivyo, 800 - 470 = <<800-470=330>>330 ni wanafunzi wa shule ya msingi.