[Timon3]

The most simple example is adding or subtracting distances. You might say you don't need that, but I'd wager most people need to at some point.

[mcpackieh]

Adding miles to miles or feet to feet make sense, but when do you add feet to miles?

[Timon3]

Can you really imagine no scenario when this might happen? Like "A to B is one mile, B to C is 200 feet, how long is A to B to C"? You've never come across anything like this in your whole life?