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

### Instruction:
 Mike anataka kununua simu mpya. Gharama ya simu ni $1300. Mike anahitaji pesa zaidi kiasi gani ikiwa tayari ana 40% ya kiasi anachohitaji?


### Response:
 Ikiwa Mike tayari ana 40% ya kiasi anachohitaji, ana $1300 * 0.4 = $<<1300*0.4=520>>520.
Hii inamaanisha Mike anahitaji $1300 - $520 = $<<1300-520=780>>780 zaidi.