How to find the output of a nested loop with a break

Question

I have to figure out what the output is, I know what the answer is but I just have no idea how they got that answer. If someone could do a step by step explanation that would be great.

a = int(input())
b = int(input())
c = int(input())
result = 0
while a < b:
    result = a * 2
    print(result)
    if result > c:
        break
    a += 4