A factory produces a batch of parts in the first ten days of May. It produces an average of 800 parts per day in the first 4 days, and a total of 1,500 parts in the next 6 days. How many parts does this factory produce on average per day in the first ten days of May?
某工厂五月上旬生产一批零件，前4天平均每天生产800个，后6天一共生产1500个，这个厂五月上旬平均每天生产零件多少个？
<gadget id="calculator">800 * 4</gadget>
<output>3_200</output>

<gadget id="calculator">3_200 + 1_500</gadget>
<output>4_700</output>

<gadget id="calculator">4 + 6</gadget>
<output>10</output>

<gadget id="calculator">4_700 / 10</gadget>
<output>470</output>

<result>470</result>