A factory saved 7,820 kilograms of coal from July to September last year. How many kilograms of coal is saved on average every day?
一个工厂去年7～9月份节约煤7820千克，平均每天节约煤多少千克？
<gadget id="calculator">31 + 31 + 30</gadget>
<output>92</output>

<gadget id="calculator">7_820 / 92</gadget>
<output>85</output>

<result>85</result>