The factory has to complete the task of assembling a batch of tape recorders, and 635 of them have been installed. In the future, if 2 more units are assembled every day than before, it will take 40 days to complete, but 5 less units will be assembled on the last day. If it is still assembled according to the original work efficiency, it will take 3 more days of work. How many tape recorders need to be assembled in this workshop.
工厂要完成装配一批录音机的任务，已经装好635台．以后如果每天比原来多装配2台，还需要40天完成，但最后一天要少装配5台．如果仍按原来的工作效率装配，就需要多工作3天，这个车间一共需要装配多少台录音机．
<gadget id="calculator">2 * 40</gadget>
<output>80</output>

<gadget id="calculator">80 - 5</gadget>
<output>75</output>

<gadget id="calculator">75 / 3</gadget>
<output>25</output>

<gadget id="calculator">40 + 3</gadget>
<output>43</output>

<gadget id="calculator">25 * 43</gadget>
<output>1_075</output>

<gadget id="calculator">1_075 + 635</gadget>
<output>1_710</output>

<result>1_710</result>