job started on March 5th and ended on May 15th. How many days did the job last?
一件工作从3月5日开始，到5月15日全部结束，这件工作一共做了多少天？
<gadget id="calculator">31 - 5</gadget>
<output>26</output>

<gadget id="calculator">26 + 1 + 30 + 15</gadget>
<output>72</output>

<result>72</result>