In DES if the 6bit input to Sbox S3 is 458 in octal what is

In DES, if the 6-bit input to S-box S3 is 458 (in octal), what is its output?

Solution

458 cannot be in octal since it contains 8 and also much larger than 6 bits. Assuming the question is for 45.

(45)₈ = (100101)₂

Inner bits = 1001

Outer bits = 01

S-box will map this to 0000.