If 6/7 = 2, 3/9 = 7, 8/2 = 6 Then 4/5 = ?

Question

If

3   2 = 7
5   4 = 23
7   6 = 47
9   8 = 79

Then

10  9 = ??

Answer 1

6 / 7 = 42 =>2
3 / 9 = 27 => 7
8 / 2 = 16 => 6

Then

4 / 5 = 20 =>0

Answer 2

Answer is 0.

Approach - multiply both the number and take first digit.

6*7 = 42 -> 2
3*9 = 27 -> 7
8*2 = 16 -> 6
similarly 4*5 = 20 -> 0