Dad is on a business trip on May 26, and it will end on June 3. How many days does Dad go on business?
爸爸5月26日出差，6月3日结束，爸爸出差多少天．
<gadget id="calculator">31 - 26</gadget>
<output>5</output>

<gadget id="calculator">5 + 1 + 3</gadget>
<output>9</output>

<result>9</result>