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

### Instruction:
A phone factory makes twice as many phones as last year. Last year’s production was 5000 phones. If a quarter of this year’s production is sold, how many phones are left in the factory?

### Response:
 Wanatengeneza simu 5000*2=<<5000*2=10000>>10000 mwaka huu.
Wanaouza simu 10000/4=<<10000/4=2500>>2500.
Zimebaki simu 10000-2500=<<10000-2500=7500>>7500 kiwandani.