The farm tool factory produces a batch of farm tools in one week, 56 pieces per day in the first 3 days, and 217 pieces in the next 4 days. How many pieces of farm tools are produced per day on average this week?
农具厂用一周时间生产一批农具，前3天每天生产56件，后4天生产217件，这一周平均每天生产多少件农具？
<gadget id="calculator">56 * 3</gadget>
<output>168</output>

<gadget id="calculator">168 + 217</gadget>
<output>385</output>

<gadget id="calculator">385 / 7</gadget>
<output>55</output>

<result>55</result>