home appliance mall sold 250 washing machines in October, 30 more in November than in October, and 34 less in December than in October. How many washing machines have been sold on average per month in these months?
一个家电商城十月份卖出洗衣机250台，十一月份比十月份多卖出30台，十二月份卖出的比十月份的2倍少34台．这几个月平均每月卖出多少台洗衣机？
<gadget id="calculator">250 * 2</gadget>
<output>500</output>

<gadget id="calculator">500 - 34</gadget>
<output>466</output>

<gadget id="calculator">250 + 250 + 30 + 466</gadget>
<output>996</output>

<gadget id="calculator">996 / 3</gadget>
<output>332</output>

<result>332</result>