Convert the binary number 10010 to decimal

Starting from the rightmost digit, assign powers of 2 (from $2^0$) to each position.
$1 \times 2^4 + 0 \times 2^3 + 0 \times 2^2 + 1 \times 2^1 + 0 \times 2^0$

$1 \times 16 = 16$
$0 \times 8 = 0$
$0 \times 4 = 0$
$1 \times 2 = 2$
$0 \times 1 = 0$

$16 + 0 + 0 + 2 + 0 = 18$

The decimal equivalent of $10010_2$ is: