prompt: Devin teaches one math course per year. He taught Calculus for 4 years, Algebra for twice as many years, and Statistics for 5 times as long as he taught Algebra. How many years has Devin taught?
messages.content: Devin teaches one math course per year. He taught Calculus for 4 years, Algebra for twice as many years, and Statistics for 5 times as long as he taught Algebra. How many years has Devin taught?
messages.role: user
messages.content: Calculus: <<4=4>>4 years
  Algebra: 4(2)=8 years
  Statistics: 8(5)=<<8*5=40>>40 years
  Total number of years taught: 4+8+40=<<4+8+40=52>>52 years
  #### 52
messages.role: assistant