Yucai Primary School will be on summer vacation from July 4th to September 1st. How many days are there in total?
育才小学从7月4日起放暑假，到9月1日开学，算一算暑假共放了多少天？
<gadget id="calculator">31 - 3</gadget>
<output>28</output>

<gadget id="calculator">28 + 31</gadget>
<output>59</output>

<result>59</result>