[
  "Draw a bar model: Cars = 10 units, Buses = 2 units, Vans = 1 unit.",
  "Cars - Vans = 10 - 1 = 9 units = 72 vehicles, so 1 unit = 72 / 9 = 8. Cars = 10 x 8 = 80, Buses = 2 x 8 = 16.",
  "Difference: 80 - 16 = 64. There are 64 more cars than buses."
]