A processing group needs to process 2315 parts, 767 of which have been processed, and the rest will be completed within 6 months. How many do you do per month on average?
一个加工组要加工2315个零件，已经加工了767个，剩下的要在6个月内完成．平均每个月要做多少个？
<gadget id="calculator">2_315 - 767</gadget>
<output>1_548</output>

<gadget id="calculator">1_548 / 6</gadget>
<output>258</output>

<result>258</result>