Xiaojun's family went on a trip. They went out in the morning of July 30th and returned home in the evening of August 10th. How many days did they travel in total?
小军一家出去旅游，7月30日早上出去，8月10日晚上回到家中，一共旅游了多少天．
<gadget id="calculator">2 + 10</gadget>
<output>12</output>

<result>12</result>