There are 18 astronauts that are trained to go to the space station. The space
shuttle can hold 7 astronauts, and they do not want to launch a space shuttle
that is not full. If they want to send as man, astronauts as possible, how many
shuttles will launch, and how many of the astronauts will remain on Earth?
Number of space shuttles that are launched:
Astronauts still on Earth: