[
  "Break 40 into factors: 40 = 10 x 4. Then 16 / 40 = 16 / 10 / 4.",
  "16 / 10 = 1.6. Then 1.6 / 4 = 0.4.",
  "Answer: first blank = 4, second blank = 1.6, third blank = 4."
]