The school bought 4 boxes of picture books, 320 copies in total, and 3 boxes of pictorial magazines, 120 copies in each box. Who bought more picture books and pictorial magazines? How many more?
学校购买4箱画册，共320本，又买进3箱画报，每箱120本，买来的画册和画报谁多？多几本？
<gadget id="calculator">120 * 3</gadget>
<output>360</output>

<gadget id="calculator">360 - 320</gadget>
<output>40</output>

<result>40</result>