conversations.from: human
conversations.value: Can you give me some step-by-step instructions for this math problem: Class A is twice as big as Class B. Class A is also a third the size of Class C. If Class B has 20 people in it, how many people are in Class C?
conversations.from: assistant
conversations.value: Class A is twice the size of Class B, so Class A = 2 * size of Class B
  If Class B has 20 people Class A has 20 * 2 = 40 people
  Since Class A is also 1/3 the size of Class C then Class A = 1/3 * Class C
  This means 40 = 1/3 * Class C
  Thus the size of Class C is 3 * 40 = 120 people