Xiaohong's father went on a business trip on July 25 and came back on August 6. How many days did he go on business? (The day you come back doesn't count)
小红的爸爸7月25日出差，8月6日回来，他出差多少天？(回来那天不算)
<gadget id="calculator">31 - 25</gadget>
<output>6</output>

<gadget id="calculator">6 + 1 + 5</gadget>
<output>12</output>

<result>12</result>