The school starts to have a holiday on July 3, and registers for the start of school on August 31. How many days are there in total?
学校7月3日开始放假，8月31日报到开学，共放假多少天．
<gadget id="calculator">31 - 3</gadget>
<output>28</output>

<gadget id="calculator">28 + 1</gadget>
<output>29</output>

<gadget id="calculator">29 + 31</gadget>
<output>60</output>

<result>60</result>