There are 90 people in the school mathematics competition. The average score is 73 points, the average score for boys is 70 points, and the average score for girls is 80 points. How many more boys than girls?
学校数学比赛，有90人．平均分73分，男生平均分是70分，女生平均分是80分．男生比女生多几人？
<gadget id="calculator">80 * 90</gadget>
<output>7_200</output>

<gadget id="calculator">90 * 73</gadget>
<output>6_570</output>

<gadget id="calculator">7_200 - 6_570</gadget>
<output>630</output>

<gadget id="calculator">80 - 70</gadget>
<output>10</output>

<gadget id="calculator">630 / 10</gadget>
<output>63</output>

<gadget id="calculator">90 - 63</gadget>
<output>27</output>

<gadget id="calculator">63 - 27</gadget>
<output>36</output>

<result>36</result>