Convert binary number `10111` into decimal number.

Explanation

`{:(4,3,2,1,0),(1,0,1,1,1):}_((2)) = 1xx 2^(4) +0 xx2^(3) + 1 xx 2^(2) +1 xx2^(1) + 1 xx 2^(0)`
`= 16 + 0 + 4 + 2 + 1 = 23_((10))`
`10111_((2)) = 23_((10))`.