This year's summer vacation is from July 6th to August 30th. How many days are there in total?
今年的暑假从7月6日～8月30日，共放假多少天．
<gadget id="calculator">31 - 6</gadget>
<output>25</output>

<gadget id="calculator">25 + 1</gadget>
<output>26</output>

<gadget id="calculator">26 + 30</gadget>
<output>56</output>

<result>56</result>