The correct answer is 37.5.
Π=3.14
Let's start with two digits:
3.14 = 3 14/100
= 3 7/50
= 157/50
would be the approximation for that. Let's add a few more digits:
3.1415 = 3 1415/10000
= 3 283/2000
= 6283/2000
135 because if you divide 90 by 2 you get 45 then add 45 and 90 and you get 135