In the third quarter, the school saved an average of 9 kilowatt-hours of electricity per day, so how many kilowatt-hours of electricity was saved in the third quarter?
学校在第三季度中，平均每天节约用电9千瓦时，那么第三季度共节约用电多少千瓦时？
<gadget id="calculator">31 + 31 + 30</gadget>
<output>92</output>

<gadget id="calculator">9 * 92</gadget>
<output>828</output>

<result>828</result>