The Art Festival for Primary School Students started on June 7th and ended on June 12th. How many days did the art festival last?
小学生艺术节从6月7日开始，到6月12日结束，艺术节一共举行了多少天．
<gadget id="calculator">1 + 5</gadget>
<output>6</output>

<result>6</result>