Students in two groups collected leaf specimens, each group consisted of 12 people, the first group collected 20 pieces per person, and the second group collected 24 pieces per person, how many more pieces were collected in the second group than in the first group?
两个小组的同学采集树叶标本，每组都是12人，第一组每人采集20片，第二组每人采集24片，第二组比第一组多采集多少片？
<gadget id="calculator">24 - 20</gadget>
<output>4</output>

<gadget id="calculator">4 * 12</gadget>
<output>48</output>

<result>48</result>