conversations.from: human
conversations.value: Ms. Cole teaches math in three levels of classes in her school. There are four times as many students in Ms. Cole's fourth-level math class as in her sixth-level math class. The number of students in her seventh-level math class is twice that in the fourth-level math class.  If Ms. Cole's sixth-level class has 40 students, how many math students does Ms. Cole teach?
  Find the solution.
conversations.from: assistant
conversations.value: Since Ms. Cole's sixth-level math class has 40 students and four times as many students in her fourth-level class, there are 4*40 = 160 in her fourth-level math class.
  For the two levels, Ms. Cole teaches math to 160+40 = 200 students.
  If the number of students in her seventh-level math class is twice that in the fourth-level math class, then she teaches 2*160 = 320 students in the seventh-level math class.
  Ms. Cole teaches 320+200 = 520 math students in the school.