Caveat: I know nothing about space exploration except what I've picked up while playing with Kerbal Space Program, so this could be a terribly stupid or offtopic question.
I'm wondering just how many burns did the Apollo 11 mission require.
Did they first have to reach a circular orbit around Kerbi…–Earth by a single burn at Apogee or did they target the Moon immediately?
Then, when they've reached the Moon did they have to retroburn at Perilune to circularize, or was the trajectory calculated so that it happened automatically?
On their way back was a single burn enough to leave the Moon or did they have to execute some corrections along the way?