Xiao Cong's summer camp is scheduled to start on July 25th and return on August 7th. How many days does it take him from departure to return?
小聪参加的夏令营活动定于7月25日出发，8月7日返回．他从出发到返回需要多少天？
<gadget id="calculator">31 - 25</gadget>
<output>6</output>

<gadget id="calculator">6 + 1 + 6 + 1</gadget>
<output>14</output>

<result>14</result>