On a 1:100,000 map, a route measures 3.2 centimetres. A student says the real route is 32 kilometres. Which distance corrects the student's scale-and-maps error?

Explication

The route represents 3.2 times 100,000, or 320,000 centimetres, which is 3.2 kilometres. The student's 32-kilometre value converts centimetres to kilometres with one zero too many.