Originally Posted by Wooglin

Booking on United earns Award Miles based on the price you pay. 5x the base fare (before tax/fees). (Plus a bonus if you are a United Premier Member).

If you had booked the flights on ANA, and credited them to UA, you would have earned miles based on distance, but with a multiplier based on fare.

In your example above, the L fare segments would earn 50% of the travel miles for each segment, and the K fare would earn 25% of miles traveled.