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

### Instruction:
Mike is saving up to buy a house.  He puts away 10% of his $150,000 a year salary.  He needs to save up 20% of the cost of a $450,000 house for a downpayment.  How long will it take?

### Response:
 Anahifadhi 150,000*.1=$<<150000*.1=15000>>15,000 kwa mwaka
Anahitaji 450,000*.2=$<<450000*.2=90000>>90,000 kama malipo ya awali
Hivyo anahitaji kuokoa kwa muda wa 90,000/15,000=<<90000/15000=6>>6 miaka