Exercise $2$: In some countries, a vehicle's fuel efficiency is measured in miles per gallon. In other countries, the efficiency is measured in litres per $100km.$ For example, $32$ miles per Imperial gallon is equivalent to approximately $8\mathrm{.}83$ litres per $100km.$

You are going to write Python statements that convert miles per gallon to litres per $100km.$ One Imperial gallon is equal to approximately $4\mathrm{.}54609$ litres. One mile is equal to approximately $1\mathrm{.}60934km.$

Hint: we recommend that, before you write any Python code, treat this as a math problem and derive a formula for converting miles per gallon to litres per $100km,$ using the conversion factors listed in the previous paragraph. Verify that the units in the conversion factors cancel out properly.

In PyTutor, click Edit this code. The memory model from Exercise $1$ will disappear. Delete the code in PyTutor's editor, then type four assignment statements: