The farm tool factory plans to produce 460 pieces of farm tools, and has already produced 304 pieces. The rest needs to be completed within 4 days. How many pieces should be produced on average per day?
农具厂计划生产460件农具，已经生产了304件，剩下的要求在4天内完成，平均每天要生产多少件？
<gadget id="calculator">460 - 304</gadget>
<output>156</output>

<gadget id="calculator">156 / 4</gadget>
<output>39</output>

<result>39</result>