In an exam, the average score of the whole class is 95.5 points. It is known that there are 24 boys, whose average score is 94.8 points, and the average score of girls is 96.3 points. Find out how many girls there are.
一次考试中，全班平均分数为95.5分，已知男生有24人，其平均分为94.8分，女生的平均分为96.3分，求女生有多少人．
<gadget id="calculator">95.5 * 24</gadget>
<output>2_292</output>

<gadget id="calculator">94.8 * 24</gadget>
<output>2_275.2</output>

<gadget id="calculator">2_292 - 2_275.2</gadget>
<output>16.8</output>

<gadget id="calculator">96.3 - 95.5</gadget>
<output>0.8</output>

<gadget id="calculator">16.8 / 0.8</gadget>
<output>21</output>

<result>21</result>