conversations.from: human
conversations.value: Find the answer to this math problem: Studying for her test, Mitchell had read ten chapters of a book before 4 o'clock. When it clocked 4, Mitchell had read 20 pages of the 11th chapter of the book she was studying from. After 4 o'clock, she didn't read the remaining pages of chapter eleven but proceeded and read 2 more chapters of the book. If each chapter in the book had 40 pages, calculate the total number of pages that Mitchell had read altogether?
conversations.from: assistant
conversations.value: Since each chapter of the book has 40 pages, Mitchell had read 10*40 = 400 pages from the first ten chapters.
  After reading 20 pages of the eleventh chapter, the total number of pages that Mitchell had read is 400+20 = 420
  The next two chapters that she read had 2*40 = 80 pages.
  In total, Mitchell read 420+80 = 500 pages of the book that day.