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

### Instruction:
Anahi bought a 500 pages book to write some notes on. In the first week, she wrote on 150 pages. In the second week, she wrote on 30% of the remaining pages. While continuing writing, she accidentally spilled coffee on the book and damaged 20 percent of the empty pages she was to write on. Calculate the total number of empty pages available for her to write on now.

### Response:
 Ikiwa alinunua kitabu chenye kurasa 500 na aliandika kwenye kurasa 150, idadi ya kurasa tupu zilizobaki ni 500-150 = <<500-150=350>>350 kurasa.
Kisha aliandika kwenye asilimia 30 ya kurasa tupu zilizosalia katika wiki ya pili, jumla ya kurasa 30/100*350 = <<30/100*350=105>>105.
Idadi ya kurasa tupu zilizobaki baada ya kuandika kwenye asilimia 30 ya kurasa tupu zilizosalia ni 350-105 = <<350-105=245>>245 kurasa.
Kisha alimwaga kahawa kwenye kurasa tupu zilizosalia, akiharibu 20% yake. Idadi ya kurasa tupu zilizoharibiwa na kahawa ni 20/100*245 = <<20/100*245=49>>49.
Idadi jumla ya kurasa tupu zilizobaki baada ya kuharibiwa na kahawa ni 245-49 = <<245-49=196>>196 kurasa.