What is the relation between the tens and units digits of the number of natural numbers between 364² and 365²?

Let: n = 364 and n + 1 = 365
There are 2n non-perfect square numbers between n² and (n + 1)².

Number of natural numbers between 364² and 365² = 2n = 2 × 364 = 728
Units digit of 728 = 8
Tens digit of 728 = 2
We can say that the unit digit of the number of natural numbers between 364² and 365² is four times the tens digit of the same number.