Two working groups, the first group has 16 people, and each person processes 13 parts on average, and the second group has 17 people, and each person processes 12 parts on average, how many more parts are processed by the first group than the second group?
两个工作小组，第一组16人，平均每人加工13个零件，第二组17人，平均每人加工12个零件，第一组比第二组多加工多少个？
<gadget id="calculator">13 * 16</gadget>
<output>208</output>

<gadget id="calculator">12 * 17</gadget>
<output>204</output>

<gadget id="calculator">208 - 204</gadget>
<output>4</output>

<result>4</result>