Hongxing Elementary School will have summer vacation from July 1st, and the new semester will start on September 1st. How many days are there in summer vacation?
红星小学从7月1日起放暑假，9月1日新学期开学上课，暑假一共有多少天．
<gadget id="calculator">31 * 2</gadget>
<output>62</output>

<result>62</result>