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?
Their novel is half as long as their 300-page history book so it is 300/2 = <<300/2=150>>150 pages
Their science book has 4 times the amount of pages as their novel, which is 150 pages, so their science book has 4*150 = <<4*150=600>>600 pages
#### 600