[
  "Split the whole-number multiplier into a factor of 10 to make the decimal multiplication easier: 60 = 6 x 10.",
  "0.4 x 6 = 2.4, then 2.4 x 10 = 24.",
  "0.4 x 60 = 0.4 x 6 x 10 = 2.4 x 10 = 24. Answer: 6, 2.4, 24."
]