The school bought 4 times more books this year than last year. You bought 890 books last year, how many books did you buy this year?
学校今年购买的图书是去年的4倍．去年购买图书890本，今年买了多少本图书？
<gadget id="calculator">890 * 4</gadget>
<output>3_560</output>

<result>3_560</result>