The school bought some homework books and distributed them to 12 classes, each class had 130 books, and there were 30 books left. How many homework books did the school buy?
学校买了一些作业本，发给12个班，每班130本，还剩30本．学校共买了多少作业本？
<gadget id="calculator">12 * 130</gadget>
<output>1_560</output>

<gadget id="calculator">1_560 + 30</gadget>
<output>1_590</output>

<result>1_590</result>