If 6=31, 5=21, 4=13, 3=7 and 2=3 then 1=?

Question

If

2    3 = 9
5    4 = 26
6    2 = 13

Then

7    4 = ??

Answer 1

ANSWER:= 1
6=31, =6 X 5=30 +1 =31
5=21, =5 X 4=20 +1=21
4=13 =4 X 3=12 +1=13
, 3=7 =3 X 2=6 +1 =7
and 2=3 =2 X 1=2+1=3
then 1=? =1 X 0=0+1=1