There are 23 cows in a dairy farm, and they eat 816 kg of grass in 4 days. According to this calculation, how many kilograms of grass will these cows eat in March?
奶牛场有23头奶牛，4天共吃816千克草．照这样计算，这些奶牛三月份要吃草多少千克？
<gadget id="calculator">816 / 4</gadget>
<output>204</output>

<gadget id="calculator">204 * 31</gadget>
<output>6_324</output>

<result>6_324</result>