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

### Instruction:
Chris buys 2 and a half dozen donuts on his way to work to share with his co-workers.  While driving, he eats 10% of the donuts.  Once inside, he grabs another 4 donuts for his afternoon snack.  How many donuts are left for his co-workers?

### Response:
 Ananunua donati 2.5 * 12 = <<2.5*12=30>>30
Anakula 30 * 10% = <<30*10*.01=3>>3 donati
Kuna donati 30 - 3 = <<30-3=27>>27
Anachukua donati nyingine 4 ambazo zinabaki 27 - 4 = <<27-4=23>>23 kwa wafanyakazi wenzake