If among 7 consecutive odd numbers, the sum of the second number and the sixth number is 38, what is the fifth number equal to?
如果在7个连续奇数中，第二个数与第六个数的和是为38，那么第5个数等于多少．
<gadget id="calculator">38 - 8</gadget>
<output>30</output>

<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">15 + 6</gadget>
<output>21</output>

<result>21</result>