The school plans to distribute "Gratitude Education" readers to 16 classes, 50 copies for each class, and 30 copies for the school library. How many copies of "Grateful Education" should schools buy?
学校准备发《感恩教育》读本给16个班，每班50本，还要给学校图书室留30本．学校应购买《感恩教育》多少本？
<gadget id="calculator">50 * 16</gadget>
<output>800</output>

<gadget id="calculator">800 + 30</gadget>
<output>830</output>

<result>830</result>