Aunt Wang visited relatives and returned to her hometown for vacation on December 15, and returned to work on February 18 of the following year. How many days are you on vacation?
王阿姨12月15日探亲回老家休假，于次年2月18日回来上班．共休假多少天？
<gadget id="calculator">31 - 15</gadget>
<output>16</output>

<gadget id="calculator">16 + 31 + 18</gadget>
<output>65</output>

<result>65</result>