Xiaohong participated in the summer camp, which started from July 25th and ended on August 14th. How many days are there in total for the summer camp?
小红参加了暑期夏令营，从7月25日开始，到8月14日结束．暑期夏令营一共有多少天？
<gadget id="calculator">31 - 25</gadget>
<output>6</output>

<gadget id="calculator">6 + 1 + 14</gadget>
<output>21</output>

<result>21</result>