Yumiao Primary School sent 100 students to participate in the mathematics competition, with an average score of 63 points, of which the average score for boys was 60 points and the average score for girls was 70 points. Among the 100 students participating in the mathematics competition, how many fewer girls are there than boys?
育苗小学选派100名学生参加数学竞赛，平均分是63分，其中男生的平均分是60分；女生的平均分是70分．参加数学竞赛的100名学生中，女生比男生少多少人．
<gadget id="calculator">63 * 100</gadget>
<output>6_300</output>

<gadget id="calculator">60 * 100</gadget>
<output>6_000</output>

<gadget id="calculator">6_300 - 6_000</gadget>
<output>300</output>

<gadget id="calculator">70 - 60</gadget>
<output>10</output>

<gadget id="calculator">300 / 10</gadget>
<output>30</output>

<gadget id="calculator">100 - 30 - 30</gadget>
<output>40</output>

<result>40</result>