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

### Instruction:
There are enough provisions in a castle to feed 300 people for 90 days. After 30 days, 100 people leave the castle. How many more days are left until all the food runs out?

### Response:
 Baada ya siku 30, kutakuwa na chakula cha kutosha kuendeleza watu 300 kwa siku 90 - siku 30 = siku 60.
Baada ya watu 100 kuondoka, kutakuwa na watu 300-100 = <<300-100=200>>200 waliobaki.
Watu hawa 200 watakula chakula sawa na 2/3 ya kikundi cha watu wa awali katika kasri kila siku.
Chakula cha siku 60 kitadumu kwa kikundi kidogo hiki kwa siku 60 / (2/3) = <<60/(2/3)=90>>90 zaidi.