The scientific expedition team set off on April 7 and planned to return on August 22. How many days did the scientific expedition team spend on this expedition plan?
科考队4月7日出发，计划8月22日返回，科考队这次考察计划一共花了多少天？
<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<gadget id="calculator">31 * 2</gadget>
<output>62</output>

<gadget id="calculator">60 + 62 + 22</gadget>
<output>144</output>

<result>144</result>