Xiaoxue's father went out for inspection from March 21st to May 30th, how many days did his father go out for inspection?
小雪的爸爸从3月21日到5月30日外出考察，爸爸在外考察多少天？
<gadget id="calculator">31 - 21</gadget>
<output>10</output>

<gadget id="calculator">10 + 1 + 30 + 30</gadget>
<output>71</output>

<result>71</result>