The second semester of Chunmiao Primary School in 2015 is expected to start summer vacation on July 9th, and start school on August 30th. How many days are there in total?
春苗小学2015年第二学期预计从7月9日开始放暑假，8月30日开学，一共放假多少天？
<gadget id="calculator">31 - 9</gadget>
<output>22</output>

<gadget id="calculator">22 + 29 + 1</gadget>
<output>52</output>

<result>52</result>