The number of boys in a class is 4/5 of the number of girls. In a math competition, the average score of the whole class is 83 points, and the average score of boys is 88 points. What is the average score for girls.
某班男生人数是女生人数的(4/5)，在一次数学竞赛中，全班的平均分是83分，男生的平均分是88分．女生的平均分是多少分．
<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">83 * 9</gadget>
<output>747</output>

<gadget id="calculator">88 * 4</gadget>
<output>352</output>

<gadget id="calculator">747 - 352</gadget>
<output>395</output>

<gadget id="calculator">395 / 5</gadget>
<output>79</output>

<result>79</result>