Starting from 25 and counting 20 consecutive odd numbers, what is the last odd number?
从25开始往后，数20个连续的奇数，最后1个奇数是多少．
<gadget id="calculator">2 * 20</gadget>
<output>40</output>

<gadget id="calculator">25 + 40</gadget>
<output>65</output>

<result>65</result>