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

### Instruction:
 Riwaya ambayo kila mtu anaisoma kwa darasa la Kiingereza ina nusu ya kurasa za kitabu chao cha historia. Kitabu chao cha sayansi kina kurasa mara 4 ya riwaya yao. Ikiwa kitabu chao cha historia kina kurasa 300, kitabu chao cha sayansi kina kurasa ngapi?


### 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