[
  "Write the division as a fraction. If the numerator is larger, simplify then convert to a mixed number.",
  "21 / 9 = 21/9. Simplify: HCF of 21 and 9 is 3, so 21/9 = 7/3. 7 / 3 = 2 remainder 1, so the mixed number is 2 1/3.",
  "Answer: A = 1, B = 3."
]