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

### Instruction:
The novel that everyone is reading for English class has half as many pages as their history book.  Their science book has 4 times the amount of pages as their novel.  If the history book has 300 pages, how many pages does their science book have?

### Response:
 Riwaya yao ni nusu ya urefu wa kitabu chao cha historia chenye kurasa 300, hivyo ina kurasa 300/2 = <<300/2=150>>150
Kitabu chao cha sayansi kina kurasa mara 4 ya riwaya yao (ambayo ina kurasa 150), hivyo kina kurasa 4*150 = <<4*150=600>>600