At the beginning of the term, the school launched the "book drifting" activity. 2,842 students from the whole school responded positively, and each donated 3 books to the rafting station. Later, 158 teachers from the whole school also participated in the book donation activity, and each donated 3 books. How many books are donated by the school? (answer in two ways)
开学初，学校启动了"图书漂流"活动．全校2842名同学积极响应，每人向漂流站捐出了3本图书，后来全校158名老师也参与到捐书活动中，每人也捐出了3本．全校共捐图书多少本？(用两种方法解答)
<gadget id="calculator">3 * 2_842</gadget>
<output>8_526</output>

<gadget id="calculator">3 * 158</gadget>
<output>474</output>

<gadget id="calculator">8_526 + 474</gadget>
<output>9_000</output>

<result>9_000</result>