Xinhua Machinery Factory produced a batch of parts in two days and packed them in the same box. (3/7) of the total amount is completed on the first day, and there are still 90 parts left after filling 3 boxes; the parts produced on the second day just fill 5 boxes. How many parts are there in this batch?
新华机械厂两天生产了一批零件，用同样的箱子包装．第一天完成总量的(3/7)，装满3箱还剩下90个；第二天生产的零件正好装满5箱．这批零件有多少个？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">1 - (3/7)</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">5 / (4/7)</gadget>
<output>35/4 = around 8.75</output>

<gadget id="calculator">(35/4) - 5 - 3</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">90 / (3/4)</gadget>
<output>120</output>

<gadget id="calculator">120 * (35/4)</gadget>
<output>1_050</output>

<result>1_050</result>