The machining workshop needs to process 875 parts. It is known that the processing takes 3.5 hours, with an average of 50 parts processed per hour, and the remaining parts are processed with an average of 56 parts per hour. How many hours will the rest of the parts be finished?
加工车间要加工875个零件，已知加工3.5小时，平均每小时加工50个，剩下的平均每小时加工56个．剩下的零件要几小时完成？
<gadget id="calculator">50 * 3.5</gadget>
<output>175</output>

<gadget id="calculator">875 - 175</gadget>
<output>700</output>

<gadget id="calculator">700 / 56</gadget>
<output>25/2 = around 12.5</output>

<result>25/2 = around 12.5</result>