100 students from Yucai Primary School participated in the mathematics competition, and the average score was 63 points. Among them, the average score of boys is 60 points, and the average score of girls is 70 points. How many fewer girls are there than boys?
育才小学100名学生参加数学竞赛，平均分是63分．其中男生平均分是60分，女生平均分是70分．问女生比男生少多少人？
<gadget id="calculator">70 * 100</gadget>
<output>7_000</output>

<gadget id="calculator">100 * 63</gadget>
<output>6_300</output>

<gadget id="calculator">7_000 - 6_300</gadget>
<output>700</output>

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

<gadget id="calculator">700 / 10</gadget>
<output>70</output>

<gadget id="calculator">100 - 70</gadget>
<output>30</output>

<gadget id="calculator">70 - 30</gadget>
<output>40</output>

<result>40</result>