1) If the mass is 62 and the force is 480, what is the acceleration?

2) If the mass is 62 and the force is 240, what is the acceleration?

3) If the mass is 62 and the force is 600, what is the acceleration?

These were already answered from a different question, but I didn't understand how that was the answer (how they got the answer), and how to write it. Please explain it in detail and show the work.