Consider the following three countries that produce GDP this way: Y = 5K Ilia: K = 100

Question:

Consider the following three countries that produce GDP this way:
Y = 5√K
Ilia: K = 100 machines
Caplania: K = 10,000 machines
Hansonia: K = 1,000,000 machines
What will GDP (Y) be in these three countries? Hansonia has 10,000 times more machines than Ilia, so why isn’t it 10,000 times more productive?