You have completed the layout of the app, but right now the app is missing the part that converts the values that are based on the user input.
Generally speaking, it's always a good idea to separate the logic of your apps from the UI, and there are great patterns in Flutter that help you achieve this result. You'll use some of those, such as ScopedModel and Business Logic Components (BLoCs), in the following projects, but for now, we can just add the conversion functions into our class.
There are certainly several ways to write the code to perform the conversion between measures for this app. The approach that I find easiest is seeing the formulas that we need to apply as a two-dimensional array of values, also ...
